The enlargement of multinodular goiter into the mediastinum through the thoracic inlet or ectopic thyroid tissues directly in the mediastinum is defined as Substernal Goiter (SG). However, there is no clear consensus in the literature on this definition. There are many definitions for SG in the literature. Most definitions are similar or overlapping. Since the thyroid is located in the neck above the thoracic inlet in its normal anatomical position, the simplest clinical definition should be preferred among the definitions regarding its descent below the thoracic inlet and adjacent to the mediastinal organs. In the American Thyroid Association guideline, SG is defined as clinical or radiological protrusion of the thyroid gland over the sternal notch or clavicle in a patient with a slightly extended neck in the supine position. SGs can be classified as primary or secondary according to their origins. In addition, there are combined SGs resulting from the enlargement of the primary SG, which is the growth of the cervical thyroid gland toward the mediastinum, and the secondary SG, which is defined as an ectopic mediastinal mass, together. We find it appropriate to define such SGs as mixed SGs. In this disease, which has the same etiology and etiopathogenesis as cervical goiter, the descent of the thyroid gland into the mediastinum due to some anatomical factors explains the physiopathology. Compression symptoms of mediastinal major vascular structures, trachea, and esophagus cause the symptoms and findings of SGs due to its localization. In addition, the relationship of SGs with possible malignancy risk and hyperthyroidism affecting the indications and methods of treatment has been discussed for a long time. In this study, we aimed to evaluate the definitions, classification, physiopathology, laboratory and imaging methods used for diagnosis, the relationship of SG with hyperthyroidism and malignancy, and briefly the treatment methods, according to the current studies from literature.

Transcatheter aortic valve implantation is a procedure in the context of non-suitable for open surgery. Measurements of aortic root width, aortic valve surface area, and measurements of the aortic tree, coronary vessels, femoral, and subclavian arteries are of critical importance. In the TAVI procedure, the dimensions of the valve to be placed on the patient are determined by the computed tomography method. Appropriate protocols should be selected for coronary scoring and inclusion of coronary arteries in TAVI imaging and after the shooting, images of coronary arteries such as curved MPR and VRT should be processed, and these images should be prepared to guide the physician who will perform the procedure. The device to be used in imaging must be a tomography device with at least 64 MCDT sections. There are two methods for these shots using ECG triggering. These methods are as follows: Retrospective scan and prospective scan. Bolus tracking method for TAVI imaging is one of the most accurate contrast giving methods that can be used. Automatic dose calibration is used. With the success of the method day by day, the importance of “Computerized Tomography TAVI,” which guides physicians during the method, has increase.

Objectives: The prognostic significance of SYNTAX Score II (SS-II) is well-known in patients with chronic coronary syndromes. However, its predictive ability for mortality in ST-segment elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary intervention (p-PCI) remains unclear. Therefore, we aimed to investigate the prognostic accuracy of SS-II in STEMI patients who underwent p-PCI.
Methods: A total of 743 STEMI patients treated with p-PCI were retrospectively analyzed. Study population was divided into three groups according to SS-II and defined as SS-IILOW ≤22.5 (n=245), 22.5 <SS-II MID ≤31 (n=243) and SS-II HIGH >31 (n=255). In-hospital and long-term mortality at long-term follow-up were defined as clinical endpoints of the study.
Results: The incidence of in-hospital (15% vs. 0.4% vs. 0.8%, p<0.001) and all-cause mortality (32.2% vs. 6.6% vs. 2.9%, p<0.001) were significantly higher in SS-IIHIGH group compared with the other two groups. In addition, Kaplan–Meier analysis showed statistically significantly increased incidence of death in SS-II > 31 group (P [log-rank] <0.001). SS-II >31 was defined as an independent predictor of all-cause mortality (hazard ratio 5.22 95% confidence interval 2.11–12.87 p<0.001). Area under the curve values derived from ROC analysis to evaluate the predictive accuracy of SS-II, anatomical and clinical SS, modified ACEF score, and Global Registry of Acute Coronary Events risk scores for all-cause mortality were 0.82, 0.71, 0.81, 0.82, and 0.82, respectively (p<0.001).
Conclusion: SS-II has an increased predictive ability for in-hospital and long-term mortality in STEMI patients undergoing p-PCI.

Objectives: The aim of this study was to compare intensive care unit (ICU) and overall hospital mortality in patients treated with favipiravir and lopinavir-ritonavir for COVID-19.
Methods: Data were collected retrospectively between March 10 and May 10, 2020, from patients’ records admitted to ICU due to COVID-19. Laboratory data, clinical characteristics, ICU and hospital mortality, ICU and hospital length of stay were compared in patients treated with favipiravir and lopinavir-ritonavir.
Results: A total of 100 patients’ data were investigated. Favipiravir was used as the treatment for 85% of patients, with the rest treated with lopinavir-ritonavir. Clinical and laboratory data of both antiviral treatment groups were similar. Length of hospital stay was 16 (9–24) days with favipiravir and 8.5 (5–12.5) days with lopinavir-ritonavir (p=0.002). Length of ICU stay for favipiravir and lopinavir-ritonavir groups were 8 (5–15) days and 4 (3–9) days, respectively (p=0.011). ICU mortality was 65.9% for the favipiravir and 80% for lopinavir-ritonavir (p=0.002). Hospital mortality for favipiravir and lopinavir-ritonavir was 67.1% and 80%, respectively (p=0.001).
Conclusion: The mortality in patients treated with favipiravir was less than patients treated with lopinavir-ritonavir. Favipiravir needs more attention and trials for its effect to be confirmed.

Objectives: The purpose of this study was to compare the peripapillary and macular vascular flow changes between healthy adults and adult patients with superficial optic disk drusen (ODD), as evaluated by optical coherence tomography angiography (OCT-A).
Methods: In this retrospective study, 44 eyes of 22 patients with superficial ODD followed-up in our neuro-ophthalmology unit and 54 eyes of 27 healthy individuals admitted to our clinic for routine ophthalmological examination were included in the study. The superior, inferior, nasal, and temporal radial peripapillary capillary plexus (RPC) vessel density (VD) values; superior, inferior, nasal, and temporal parafoveal and foveal region superficial capillary plexus (SCP) and deep capillary plexus (DCP) VD values; and choriocapillaris flow (CCF) area and foveal avascular zone area were evaluated by OCT-A.
Results: There was no statistically significant difference between groups in terms of age and sex. While there was a significant decrease in the temporal RPC VD values in cases with ODD (p=0.02), no significant difference was observed in other quadrants. No significant differences in either parafoveal zone four quadrant, foveal SCP and DCP VD values, or foveal avascular zone measurements were found between groups, while CCF area values were significantly higher in the study group (p=0.012).
Conclusion: Compared to healthy controls, our results showed a decrease in the RPC temporal quadrant VD values, and an increase in CCF area in cases with superficial ODD. To evaluate the effects of ODD on optic nerve head and macular perfusion, and to understand its underlying mechanisms and secondary complications, longer follow-up studies with larger case series are needed.

Objectives: Retrocochlear pathology associated with audiovestibular symptoms is detected in very few of the patients, and most of the internal acoustic canal magnetic resonance imaging examinations (IAC-MRIs) are either completely normal or include accompanying incidental findings (IFs). The aim of our study is to reveal the presence and frequency of IFs in IAC-MRIs, together with retrocochlear lesions. In addition, we intend to emphasize the clinical importance of these IFs.
Methods: A retrospective analysis of 374 serial IAC-MRI scans.
Results: Gender distribution: 201 males and 173 females. Age range: 2–82 years. Seventy-two scans (19.25%) were totally normal. Fifteen scans (4.01%) demonstrated only pontocerebellar angle findings (PCAFs). The presence of PCAF and IF was together in 57 scans (15.24%). In 230 (61.50%) of the scans, only IFs were present. The incidence of IFs in all IAC-MRIs was 76.74% (287 of 374). Critical findings that may require clinical further evaluation and examination were present in 34 scans (9.09%). IFs that did not require further examination were observed in 253 scans (67.65%).
Conclusion: Various IFs can be detected with IAC-MRI that may cause similar symptoms with PCAF. And unfortunately, some of these IFs may be of very high clinical importance. All referral clinicians should know well that these audiovestibular symptoms can appear as IFs anywhere in the auditory pathway, and how they should be followed in their clinical approach.

Objectives: We aimed to determine the long-term effects of metal-on-metal (MoM) cobalt (Co)-chromium-containing prostheses used in total knee arthroplasty (TKA) on hearing and tinnitus.
Methods: A total of 88 patients with the normal otoscopic examination and normal blood B12 levels, consisting of 44 patients who had been using MoM Co-chromium-containing total knee prosthesis for more than 5 years, and 44 non-implanted patients with similar demographic characteristics, were randomly selected and included in the study. Patients with previous ear surgery, chronic middle ear disease, or conductive hearing loss were excluded from the study. All participants were evaluated with pure-tone audiometry (PTA), distortion product otoacoustic emission (DPOAE), tinnitus handicap inventory (THI), and tinnitus reaction questionnaire (TRQ).
Results: The mean age of the 88 patients was 67.22±10.4 years. The mean age of 44 patients who underwent TKA at least 5 years ago was 72.89±7.18 years, 75% of these patients had bilateral prostheses, and the mean prosthesis duration was 11.00±5.08 years (range 5–25). The two groups were compared statistically using PTA, DPOAE, THI, and TRQ scores. When the patient groups with and without prostheses were compared in terms of hearing and tinnitus, we did not find a significant difference between the two groups (p>0.05).
Conclusion: In our study, we observed that the long-term use of MoM Co-chromium total knee prostheses did not have an ototoxic effect, contrary to what was believed. We also found that prolonged prosthesis duration or undergoing bilateral surgery did not worsen hearing and tinnitus.

Objectives: Data concerning the usefulness of pleth variability index (PVI)-based goal-directed fluid management (GDFM) in gynecologic surgery is limited.
This study purposed to compare the impact of PVI-based GDFM to conventional fluid management (CFM) on intraoperative hemodynamics and lactate levels in subjects undergoing gynecologic surgery.
Methods: This randomized and controlled trial was conducted on 70 patients undergoing elective gynecologic surgery. Subjects were randomly assigned to CFM or GDFM. Hemodynamic data and results of the arterial blood gas analysis, and total amount of the fluid infused were recorded throughout the surgery at 1-h intervals.
Results: The amount of the total fluids was significantly higher in the CFM group compared to that of the GDFM group (p<0.001). Mean arterial pressure recorded at the 2nd h of the surgery was significantly lower in the CFM group compared to that of the GDFM group (p=0.047). While there were no significant differences between the baseline and the 2nd h lactate levels in the GDFM group, the lactate level significantly increased from baseline to the 2nd h in the CFM group (p=0.010).
Conclusion: Implementation of PVI-based GDFM provides better intraoperative hemodynamic stability and lower lactate levels compared to the CFM in subjects undergoing gynecologic surgery.

Objectives: In this study, we aimed to investigate the surgical technique and biochemical parameters that affect biliary complications in liver transplants from live and cadaver in our center.
Methods: In this study, 141 patients who underwent liver transplants at Istanbul Yeni Yüzyýl Universty Gaziosmanpaþa Hospital organ transplant center between January 2018 and January 2020 were included in the study. The patients were monitored for 12–24 months. The patients included in the present study were examined retrospectively. Factors that may cause biliary tract complications and treatment modalities for complications were examined.
Results: In this study, liver transplantation from 124 living donors and 17 cadavers was performed. Twenty-three patients were under the age of 18. Only seven of 39 biliary complications were operated on. The rate of finding the right graft in patients with biliary complications was higher (p<0.05). There was no statistically significant difference between the groups concerning left, left lateral, and whole graft presence (p=0.561, p=0.172, and p=0.057, respectively). Double biliary anastomosis was to be higher in the biliary complication group, but there was no statistically significant difference (p=0.086).
Conclusion: Biliary complications are common, especially in liver transplants taken from the right lobe. Significant patient survival can be achieved with an early diagnosis and an appropriate treatment approach.

Objectives: Percutaneous internal ring suturing (PIRS) method for inguinal hernia (IH) repair in girls is increasingly used in clinics especially experienced in minimal invasive surgery. We aimed to evaluate and compare our results of laparoscopic PIRS and the open procedure for IH repair in girls in our series.
Methods: We retrospectively evaluated female patients in our pediatric surgery clinic who underwent IH surgery between 2012 and 2017 and results were assessed statistically.
Results: We identified 293 girls operated in our clinic with IH. In 164 of them, PIRS procedure (group 1) was performed; 73 had right, 26 had left, and 65 (39.6%) had bilateral IH. Among these 65 patients, 16 had only right and 11 had only left IH according to preoperative examination, which turned out to be bilateral during laparoscopy. In the open surgery group (Group II), there were 129 patients. Seventy-eight patients had right, 38 had left, and 13 (10%) had bilateral IH. Sliding fallo-pian tubes were present in seven of Group I versus 21 of group II (p<0.001), while sliding ovaries were present in seven of Group I versus 16 of Group II (p=0.015). Recurrence was observed in only one patient in Group I (p>0.05).
Conclusion: The higher rate of bilaterality is still the problem for laparoscopic procedures. Despite over-diagnosis, no more complications were not detected due to PIRS. High ratio of sliding tubes and ovaries can be due to traction for preparing the sac in open surgery. Hematoma can be a serious problem to complete PIRS procedure. Preferred technique from the surgeon’s point of view is in favor of PIRS procedure. In addition, PIRS pro-cedure can be more protective for internal genitalia, but more studies with higher numbers and longer follow-up period are needed.

Objectives: Pancreaticoduodenectomy (PD) is one of the most challenging operations in gastrointestinal system due to the difficulty of dissection areas and the need for complex reconstruction. The aim of this study is to compare the morbidity, post-operative pancreatic fistula (POPF), and mortality rates of the cases we have from the learning period for minimally invasive PD and our previous open PD cases with similar fistula risk scores (FRSs).
Methods: Patients with similar age, ASA score, pre-operative drainage, and FRS were included in the study. A total of 71 patients, 48 of whom were operated with open surgery and 23 with minimally invasive methods, were included in the study.
Results: When the statistical analysis performed, no statistically significant difference was found between open surgery and minimally invasive surgery groups in terms of age, gender, ASA score, pre-operative drainage, pancreatic texture, and treatment of pancreatic leakage (p=0.27, p=0.09, p=0.4, p=0.39, p=0.76, and p=0.36, respectively). There was a statistically significant difference between two groups in terms of clinically relevant pancreatic anastomotic leakage (Grade-B and Grade-C fistula) (p=0.11). The rate of Grade-BL and B leakage was higher in the minimally invasive surgery group, while Grade-C fistula was not observed in any patient (p=0.002). However, there was no statistically significant difference between the two groups in terms of the management of pancreatic leakage and related morbidity (p=0.36). There was no significant difference between the two groups in terms of tumor size, number of lymph nodes removed, FRS, amount of intraoperative bleeding, and diameter of Wirsung and common bile duct (p=0.15, p=0.20, p=0.145, p=0.80, and p=0.073, respectively). Considering the operation time, it was found that the operation time was longer in patients who received minimally invasive surgical treatment and this was statistically significant (p<0.0001).
Conclusion: As a result, we believe that minimally invasive PD operation can be performed with similar morbidity and acceptable CR-POPF rates when compared with the open PD with similar FRS at the learning stage.

Objectives: We aimed to compare the outcomes of patients who underwent laparoscopic adrenalectomy (LA) for pheochromacytoma (PHE) ≥5 cm versus <5 cm in diameter.
Methods: Demographic variables, tumor characteristics, perioperative, and post-operative outcomes were evaluated retrospectively and compared between groups.
Results: Between February 2008 and August 2020, 54 patients (27 female and 27 male) enrolled to the study and divided into two groups according to the tumor size as group L ≥5 cm (28 patients) and group S as <5 cm (26 patients). Groups compared in the aspect of American Society of Anesthesiologists scores, body mass index, tumor locations, ratio of elder (≥60-years-old) patients, and gender ratio were similar between groups S and L (p=0.572, p=0.516, p=0.6, p=0.331, and p=0.207, respectively). Mean duration of surgery (p=0.266), mean estimated blood loss (p=0.587), and mean length of hospital stay (p=0.374) were similar between groups. Difference between maximum and pre-operative systolic pressure and the difference between maximum and pre-operative diastolic pressure were similar between S and L groups (p=0.852 and p=0.526, respectively). Patients whose systolic blood pressure >160 mmHg, systolic blood pressure >30% of baseline, and heart rate >110 (p=0.307, p=0.609, and p=0.296) were similar. Diastolic blood pressure <30%, there is a difference between groups in favor of group L, but not statistically different (p=0.077).
Conclusion: It is necessary to work in coordination with endocrinologists and anesthesiologists and LA for PHE should be performed in experienced medical centers regardless of tumor size with multidisciplinary approach.

Objectives: Concomitant thyroid disease affects almost half of the primary hyperparathyroidism (PHPT) patients. Pre-operative evaluation of the thyroid gland for the early diagnosis of thyroid carcinoma is essential in PHPT patients. Herein, we aim to investigate the clinicopathologic features that affect the type and extent of surgery in patients having PHPT and concomitant thyroid disease but especially thyroid cancer.
Methods: The files of consecutive patients who underwent parathyroidectomy for PHPT during a 6-year period were retrospectively reviewed. The cases who underwent parathyroidectomy and simultaneous thyroidectomy were enrolled in the study. A total of 84 patients who met the study criteria were divided into two groups as benign thyroid disease (Group 1) and malignant thyroid disease (Group 2) according to the final histopathological examination. The demographic and clinicopathological characteristics were compared between groups.
Results: Concomitant thyroid disease was found in 158 (55.6%) of 284 patients who were operated on for PHPT. Simultaneous total thyroidectomy or lobectomy was performed for 84 (29.6%) patients and thyroid carcinoma was detected in 29 (10.2%) patients. Total thyroidectomy and complication rates were higher in Group 2 (p<0.05). Pre-operative fine-needle aspiration biopsy was obtained in 58.3% of patients and it identified only 26.3% of histopathologically confirmed thyroid carcinoma. Only pre-operative serum phosphorus level was found higher in Group 1 (p<0.05), but none of the study parameters was found as an independent risk factor for thyroid malignancy (p>0.05) in multivariate analysis.
Conclusion: There is no accepted parameter yet to predict the accompanying thyroid carcinoma in PHPT patients. However, a benign biopsy cannot exclude thyroid malignancy in PHPT patients and may cause undiagnosed thyroid carcinoma due to papillary microcarcinoma.

Objectives: Primary hyperparathyroidism (PHPT) is a common endocrine disease. Ectopic adenomas may cause a failed surgery which results in persistence or recurrence. Intrathyroidal parathyroid adenoma (ITPA) is a rare reason for PHPT and site of ectopia. Herein, we aimed to investigate the clinical and imaging features of patients with ITPAs and the effectiveness of radiological tools for localization at a tertiary reference center.
Methods: The files of 708 consecutive patients who underwent parathyroidectomy for PHPT in our department between January 2007 and December 2021 were investigated retrospectively. PHPT patients with ITPA were included in the study. Patients with missing data were excluded from the study. Clinicopathological features of the patients and radiological evaluation findings were investigated.
Results: Twenty-eight (28/708: 3.9%) patients were included in the study. The complete intrathyroidal gland and subcapsular parathyroid gland were observed in 8 (1.1%) and 20 (2.8%) patients, respectively. The ultrasound and parathyroid scintigraphy revealed the accurate localization of ITPA in 25 (89.3%) and 18 (64.3%) patients, respectively. Additional imaging modalities were applied for 10 patients in which conventional localization studies were discordant or inconclusive. ITPAs were most commonly found in the lower gland (n=20) localization. All patients had a successful parathyroidectomy and neither persistence nor recurrence was occurred in the study group.
Conclusion: The ITPAs are rare in PHPT. The ultrasound has a high diagnostic rate in experienced hands. The second-line imaging methods may be favorable in the presence of negative or discordant scans. The pre-operative localization studies can detect the ITPAs in most patients, so blind thyroidectomy should be avoided.

Objectives: One of the most common complications of thyroidectomy is hypoparathyroidism and that complication has a multifactorial etiology. The etiology of post-operative hypoparathyroidism is multifactorial, some factors affecting hypoparathyroidism have been revealed in the literature, and there are some conflicting results about this complication. In the present study, we aimed to evaluate pre-operative and intraoperative factors affecting development of hypoparathyroidism.
Methods: Data of 542 patients underwent thyroidectomy±central dissection (±lateral dissection) and whose post-operative parathormone values could be obtained, between 2012 and 2020 were collected prospectively and evaluated retrospectively. A parathyroid hormone (PTH) value of <15 pg/mL at the post-operative 4th h was defined as hypoparathyroidism, and a calcium (Ca) value of <8 mg/dl on the 1st post-operative day was defined as biochemical hypocalcemia. Patients were divided into two groups as post-operative hypoparathyroidism (Group 1) and non-hypoparathyroidism (Group 2). In addition, PTH value below the reference value at the post-operative 6th month and/or still needing calcium treatment was defined as permanent hypoparathyroidism. Demographic data of the patients, pre-operative biochemical values, surgical indications, intraoperative findings, post-operative 4th h PTH values, post-operative 1st day calcium values, and pathological examination of the specimen whether there was an unintenionally resected parathyroid gland or not were evaluated as risk factors for hypoparathyroidism. A logistic regression model was used to determine independent risk factors for the development of hypoparathyroidism.
Results: Hypoparathyroidism was determined in 124 (22.9%) and hypocalcemia was determined in 120 (22.1%) patients. According to 6-month follow-up period; 110 (20.3%) patients were transient, 7 (1.3%) patients were permanent, and 7 (1.3%) patients data could not be obtained. The hypocalcemia rate was higher in Group 1 (39.3% vs. 14.3%, p<0.0001), also the post-operative 1st day calcium values were lower (8.2+0.7 mg/dl vs. 8.5+0.6 mg/dl; p=0.000). The rate of parathyroid autotransplantation, the rate of parathyroid gland in pathological specimen, and the rate of central dissection were significantly higher in Group 1 compared to group 2 (15.8% vs. 8%; p=0.006; 20% vs. 10.6%; p=0.003; 16.4% vs. 5.3%, p<0.0001, respectively). The difference between the two groups was significant in terms of the number of remaining parathyroids, and the rate of the number of patients with four remaining parathyroids in place was higher in Group 2 than in Group 1 (84.1% vs. 67.9; p=0.000). In the logistic regression analysis, only central dissection is an independent risk factor affecting the development of hypoparathyroidism, and central dissection increases the risk of hypoparathyroidism approximately 2.3 times (p=0.014; OR: 2.336). The other factors were not determined as independent risk factor.
Conclusion: Performing central neck dissection with total thyroidectomy may increase the risk of hypoparathyroidism development. The risk of hypoparathyroidism should be considered when evaluating the indications and dissection extent in the central dissection. Maximum effort should be made to preserve the parathyroid glands and their vascularization during central dissection, and if there is a removed parathyroid gland, it should be autotransplanted.

Objectives: Thyroid nodules (TN) are common. Genetic and environmental factors as well as chronic inflammation play a role in occurrence of these nodules. The key point in diagnostic assessment is to rule out malignancy. Biomarkers that can show the possibility of malignancy continue to be investigated. We evaluated the relationship between sedimentation rate, leukocyte, fibrinogen, C-reactive protein (CRP), and pentraxin 3 (PTX3) inflammatory markers and characteristics and cytology of TN.
Methods: This study included a nodular goiter group with 55 persons and control group with 58 persons. Participants’ gender, age, family history, thyroid function tests, sedimentation, leukocyte, fibrinogen, CRP, and PTX3 serum levels were recorded. The number of nodules, the largest nodule diameter, nodular echogenicity, and nodule structures were examined on ultrasonography (US) and thyroid biopsy was performed.
Results: The number of TN in patients was between 1 and 4. The number of patients with two TN was higher (47.3%, n=26). Nodule diameters differed between 3 and 62 (mean 21) mm. In thyroid biopsy, papillary thyroid cancer was detected in 25.5% (n=14) of the patients. The number of nodules on US increased as CRP values increased (p=0.013). In addition, the number of nodules on US decreased as fibrinogen values increased (p=0.003). No significant difference was found between the groups in terms of sedimentation, leukocyte, and PTX3 values.
Conclusion: The number of TN was positively correlated with CRP and negatively correlated with fibrinogen levels. However, there was no difference between benign and malignant differentiation and biomarkers. CRP values that correlate with the increase in the number of nodules can be used in prognosis and clinical follow-up.

Objectives: In gastrointestinal stromal tumors (GIST), malignancy potential is determined by the prognostic disease risk stratification based on mitosis, tumor size, and location. Phosphohistone H3 (PHH3) is an immunohistochemical marker showing mitotic activity in cells. In this study, we aimed to evaluate mitosis in GIST with PHH3, compare the results with hematoxylin and eosin (HE) stained slides, and examine its relationship with other prognostic data.
Methods: Clinicopathological findings and survival were determined in GIST cases diagnosed between 2006 and 2017. The prognostic risk score was calculated according HE- and PHH3-based mitosis. The cases were classified as Group I: HE + and PHH3 + and Group II: HE + and PHH3–. They were also grouped as those diagnosed before and after 2012 and the staining results of HE and PHH3 were re-analyzed.
Results: Ninety-eight cases were included in the study. Mitosis was detected with both HE and PHH3 in 63.3% of the cases (62/98 cases) (Group I) while in 36.7% of cases, it was detected with HE but not with PHH3 (Group II). In only two cases, the risk score changed with PHH3 (very low → intermedier grade). The ratio of HE + and PHH3 + cases in 2012 and after was significantly higher than HE + and PHH3 – cases. A statistically significant relation was found between HE- and PHH3-based risk scores (p<0.05). There was a significant difference between HE-based risk score groups in terms of survival (p<0.05), while no difference was observed between the PHH3-based risk score groups (p>0.05).
Conclusion: In GIST cases, PHH3 can be used to determine mitosis in more recent blocks, taking into account the technical conditions of the laboratory, but it does not seem to be superior to mitosis detected by HE. Research should continue on new survival determinants for GIST.

Objectives: The objective of the study was to determine the effect of variant histology on pathological outcomes and survival in patients operated for the upper urinary tract urothelial carcinoma (UTUC).
Methods: Data of 128 patients who were operated for UTUC between 2001 and 2019 were retrospectively analyzed. Patients with pure urothelial carcinoma and patients with variant histology were compared in terms of demographics, pathological outcomes, and survival.
Results: The mean age of the patients was 65±11 years, female to male ratio was 30/98 and median follow-up period was 26.5 (1–176) months. Variant histology was detected in 14.8% of patients. Variant histology was found to be associated with surgical margin positivity, lymph node metastasis, presence of lymphovascular invasion, high tumor stage and grade (p=0.001, p=0.012, p=0.001, p=0.002, and p=0.009, respectively). Three-year cancer-specific and overall survival rates were 79.6% and 77.3%, respectively. There was no statistically significant relationship between variant histology with cancer-specific and overall survival (p=0.514 and p=0.515, respectively).
Conclusion: Variant histology of UTUC was found to be associated with locally advanced disease, but its effect on survival could not be demonstrated.

Objectives: Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive diseases characterized by salt wasting or virilization. 21 hydroxylase deficiency (21-OHD) accounts for 90–95% of all cases of CAH and caused by the genetic defects of CYP21A2. Other forms include 3-β-hydroxysteroid dehydrogenase deficiency, 11-β-hydroxylase deficiency (11β-OHD) (%5-8), 17-α-hydroxylase deficiency (17α-OHD), and steroidogenic acute regulatory protein (STAR) defects (congenital lipoid adrenal hyperplasia) with mutations in HSD3B2, CYP11B1, CYP17A1, and STAR, respectively. Objectives: Herein, we aimed to present the clinical and genetic features of 64 patients with various types of CAH.
Methods: Sixty-four patients with CAH, monitored in the Izmir Dr. Behcet Uz Children Hospital Division of Pediatric Endocrinology, were retrospectively analyzed for the clinical, laboratory, and genetic data.
Results: Fifty-six patients (87.5%) had 21-OHD and four patients (6.3%) had 17α-OHD, three patients (4.7%) had 11β-OHD, and one patient (1.5%) had STAR defect. The most common presenting features in 21-OHD were ambiguous genitalia. Patients with 21-OHD were diagnosed earlier than the rare groups. Disease-causing variants of CYP21A2 were identified in 46 patients. The most common mutations were IVS2, Q318X, I172N, and large deletions. Three patients with 11β-OHD were presented with enlargement of penis and early pubic hair at the median presenting age of 26 months. 17α-OHD deficiency was detected in 4 cases. Genetic analysis revealed two different homozygous CYP17A1 variants. The patient with STAR defect was presented with dehydration and cholestasis in 44 days of the life. Genetic analysis of patient with STAR deficiency revealed a novel homozygous variant.
Conclusion: The current study reported a genotype-phenotype correlation consistent with literature data in CAH cases with 21-OHD. This study also reported novel homozygous variants in STAR and CYP17A1 genes that lead to rare types of CAH.

Papillary thyroid cancer can usually metastasize to neck lymph nodes. Distant metastases are generally seen as solid organ metastases, in contrast, skin metastasis can rarely be seen. We present a case with papillary thyroid cancer diagnosed with skin metastasis as first clinical sign of distant organ metastasis.
A 63-year-old male patient admitted with a skin lesion in the left lateral neck. He had undergone subtotal thyroidectomy 14 years ago without relevant history of malignancy. Follicular variant papillary thyroid cancer was detected in the excisional biopsy performed from the cutaneous lesion. A 12 × 10 × 8 mm hyperechoic nodule in the left lobe was detected in USG and evaluated as Bethesta-III in fine needle aspiration biopsy. Bilateral multiple lung metastases were detected on thorax CT, trucut-biopsied from largest nodule and confirmed as metastasis. Carcinoma was not detected in total thyroidectomy, and post-operative multiple RAI therapies were applied.
Patients without history of thyroid cancer rarely present with skin metastases and thyroid cancer should not be overlooked in differential diagnosis. Despite meticulous evaluation of the thyroidectomy specimen, tumor may not be detected in the gland. Skin metastasis in papillary thyroid cancer should be evaluated as distant metastasis and investigations for other metastases should be done, and the treatment should be planned in a multidisciplinary manner.