Endocrine Abstracts

Introduction: medullary thyroid carcinoma (MTC) is a neuroendocrine thyroidal cancer. World Health Organization recognizes a grading system for almost all neuroendocrine tumors; however, a shared grading system for MTC is still lacking. We performed a clinical and pathological review of 257 MTCs to evaluate which histologic features have an impact on the disease specific survival and to propose a new grading system.Method: We retrospectively reviewed cli...

Background: CV-PTC is often indolent with excellent long-term response, while TCV-PTC (≥50% of tall cells) have aggressive features and worse clinical behavior. Less is known about the clinical behavior of CV-PTC with tall cells <50% (TC/CV-PTC) that, so far, is considered as low risk tumor.Aim: To evaluate the histological presentation of CV-PTC, TC/CV-PTC, TCV-PTC and their clinical behavior after 6 years of follow up.M...

Background: CCH and serum hypercalcitoninemia (iperCT) can be found in benign thyroid diseases such as thyroiditis and in some cases of papillary (PTC) or follicular (FTC) thyroid microcarcinomas. The question of whether the association with these latter is related to the malignancy of the nodule is still unclear.Aim of the study: To evaluate the difference in the CCH prevalence, at histology, in a series of benign (BTN) and malignant (PTC/FTC) thyroid n...

Genetic intratumor heterogeneity has been recently demonstrated in some solid human cancers and a few years ago RET mutated and not mutated cells were described in medullary thyroid carcinoma (MTC). Nobody reported the presence of two different RET mutations.Aim of our study was to investigate the RET somatic mutation profile in primary MTC (pMTC) and in the corresponding metastatic tissues (mets).We studied pMTC and mets of 22 MTC...

Several studies have identified a relationship between oncogene activation and dedifferentiation of PTC. Mutations of RAS, RET/PTC and BRAF modulate the expression of thyroid genes. An impaired NIS expression has been demonstrated in PTCs harboring the BRAFV600E mutation.Aim of this study was to analyze BRAF and RET/PTC1-3 alterations and their influence on the expression of thyroid differentiation genes. Seventy-one PTC samples were studied. Quantitative analysis o...

Introduction: Virtually all familial cases of Medullary Thyroid Carcinoma (MTC) have a RET germline mutation. Subjects harboring RET germline mutation without unaware of their condition are defined gene carriers (GC). Thyroid surgery timing is decided upon RET mutation and calcitonin levels (both basal, bCT, and stimulated, sCT). However, bCT and sCT thresholds for planning thyroid surgery have not been established, yet.Methods...

Although 20% of follicular neoplasms are papillary thyroid carcinoma (PTC), their cytological diagnosis is not diagnostic. A different profile of gene expression between malignant and benign thyroid tumors has been reported. Aim of this study was to identify a gene expression profile to be used in distinguishing malignant from benign thyroid neoplasms. By real-time RT-PCR we analyzed mRNA expression of 6 thyroid differentiation genes (TTF-1, PAX8, TPO, TSHr, NIS and Tg) and 5 ...

Objectives: Currently 131I treatment after surgery is suggested in selected intermediate-risk and in high-risk patients with DTC. In patients with radio-avid structural disease and in those with biochemical disease a second 131I treatment could be considered. However data about the impact of the second 131I treatment on clinical status remains controversial.Methods: Clinical data of 231 DTC patients followed at the Unit o...

Background: Up to 2016, NIFT-P was considered a non-invasive encapsulated follicular variant of papillary thyroid carcinoma (FV-PTC) and was reclassified and downgraded to a pre-malignant lesion. However, if these nodules have peculiar ultrasonographic features able to pre-operatively suggest their histology is still a matter of discussion. We evaluated a large series of NIFT-P, FV-PTC, FTC, and FA to characterize their ultrasonographic features.Methods:...