ACTA ENDOCRINOLOGICA (BUC)

Introduction. Primary hyperparathyroidism is diagnosed earlier and more frequently with the introduction of routine serum calcium measurements. In literature, it is shown that mortality and morbidity decrease after parathyroidectomy. In our study, we aimed to determine the effect of parathyroidectomy on oxidative stress. Materials and Methods. The results of 41 patients who underwent parathyroidectomy for primary hyperparathyroidism between March 2018 and end of December 2018 were evaluated prospectively. Total antioxidant capacity (TAC), superoxide dismutase (SOD), thiobarbituric acid reactive substances (TBARS), 8-hydroxy- 2’-deoxyguanosine (8-OHdG), malondialdehyde (MDA), parathyroid hormone, calcium and albumin were measured before and after parathyroidectomy. Results. The mean age of the patients in the study was 45 ± 13.1 years (age range: 18-76 years). The female/ male ratio was 32/9. Postoperative values of 8OHdG, MDA and SOD 1 were significantly lower than preoperative values (p <0.05). There was no significant difference between preoperative and postoperative TAC and TBARS values. Conclusion. Oxidative stress decreased in patients with primary hyperparathyroidism after parathyroidectomy. Randomized prospective studies are needed to show the relationship between biochemical and clinical parameters in order to see the clinical reflection of the study.

Objective. Graves' orbitopathy (GO) is an autoimmune inflammatory disorder characterized by proptosis, diplopia, and extraocular motility restriction. Intravenous glucocorticoids (IVGC) are the mainstay of treatment in active moderate-to-severe GO; however, some patients require additional therapy. This study compared the clinical outcomes of IVGC alone and in combination with orbital radiotherapy (RT) or mycophenolate mofetil (MMF). Methods. Forty patients with active moderate-tosevere GO (Clinical Activity Score ≥3) treated between 2015 and 2023 were included. Patients were grouped as IVGC monotherapy (n=24), IVGC+RT (n=8), and IVGC+MMF (n=8). Outcomes included CAS, proptosis (Hertel exophthalmometry), diplopia, and motility restriction at baseline and 6 months. Results. CAS significantly decreased in all groups (p<0.001). A ≥2-point reduction in CAS was observed in 91.7% of the IVGC group and in all combination therapy groups (p=1.000). Proptosis reduction ≥2 mm occurred in 57.1%, 100%, and 71.4% of patients in the IVGC, IVGC+RT, and IVGC+MMF groups, respectively (p=0.534). No statistically significant differences were detected in diplopia or motility outcomes between treatment groups. However, these findings should be interpreted cautiously given the limited sample size and unequal group distribution. Conclusion. IVGC effectively reduces disease activity in active moderate-to-severe GO. Although combination therapies showed numerically favorable trends in some outcomes, the retrospective design, unequal treatment allocation, and limited sample size preclude definitive conclusions regarding comparative efficacy between treatment strategies. Larger prospective studies are warranted to better delineate the role of combination approaches in active moderate-to-severe GO.

Context. Thyroidectomy is becoming an ambulatory surgical procedure. By predicting hypocalcemia,duration of hospital stay might decline. We tried to determine whether measuring parathormone two hours after total thyroidectomy predicts hypocalcemia. Objective. We aimed to design a protocol for early prediction of hypocalcemia by defining PTH measurement time and cut-off value of our center. Design. One hundred and six patients undergoing total thyroidectomy between November 2017 and October 2018 were prospectively studied. Methods. Pregnant women, patients with renal failure, parathyroid disease, previous neck operation and thyroid malignancy requiring neck dissection were excluded from the study. Parathormone (PTH) and calcium measurement was done preoperatively and in the postoperative second hour. Results. Group 1 consisted of 75 normocalcemic patients while group 2 had 31 hypocalcemic patients. Mean age was 45±13.1 (age range: 18-76). Female/male ratio was 82/24. While with a 8.36 pg/mL postoperative second hour PTH, hypocalcemia can be predicted with a 51.5% sensitivity and 90.7% specificity while with a PTH decline of 40.8% hypocalcemia can be diagnosed with a 83.9% sensitivity and 52% specificity. Conclusion. Postoperative second hour PTH and PTH percentage decline can predict postoperative hypocalcemia in total thyroidectomies. Preoperative Dualenergy X-ray absorptiometry (DXA) was not found useful in hypocalcemia prediction.