Endocrine Abstracts

Background: In accordance with the WHO Classification of tumours of endocrine organs (Lyon, 2004) clear cell thyroid lesions have not been separated in one category as they are occurred quite rare, characterized by various cellular origin, heterogeneous morphological type, and malignant potential. Difficulties of morphological diagnosis of clear cell thyroid lesions are also obvious.Aim: Retrospective morphological study of clear cell thyroid tumours has...

Papillary thyroid carcinoma (PTC) is a malignant tumour of follicular cell origin that is characterized by a broad diversity of histological variants. A genesis of multifocal PTC may be explained by both intrathyroid tumour dissemination and multiple focuses of tumour origination. A combination of two different focuses of PTC characterized by various molecular alterations of tumour cells in one thyroid could be rarely occurred. Follicular variant has similar clinical behaviour...

Papillary thyroid carcinoma (PTC) is a malignant tumor of follicular cell origin that is characterized by a broad diversity of morphological features. There are 15 different histological types of PTC in the recent edition of WHO classification. Morphology of PTC is important to estimate a metastatic potential of tumor and to make an accurate prognosis of clinical behaviour.Objective of the work is to study a relationship between frequency of regional met...

Background: An increased incidence of thyroid cancer among young population of contaminated territories of Russia after Chernobyl accident made very important morphological verification of diagnosis. Many epidemiological and molecular studies of post-Chernobyl thyroid cancer conducted by various research teams required an independent review of tumour histology. The International Pathology Panel formed consensus diagnosis for each case of post-Chernobyl thyroid tumours and prop...

Background: Papillary thyroid carcinoma (PTC) is a well differentiated malignant tumour that usually has a good prognosis in vast majority of patients after thyroidectomy, suppressive hormonal, and radioiodine treatment. However 5–10% of PTC cases can develop local relapse and distant metastases.Purpose of study: To make a comparative morphological analysis of PTC in two groups of patients: i) with and ii) without local relapse (regional metastases)...

Introduction: CYP11B2 is a key enzyme of primary aldosteronism, and several factors are involved in the regulation of CYP11B2 expression and the overproduction of aldosterone. Somatic mutations in aldosterone-driver genes are strongly associated with CYP11B2 expression and have been only detected in the CYP11B2-positive tumor area, indicating that aldosterone producing adenoma (APA) intratumoral heterogeneity corresponds to non-uniform CYP11B2 expression in neoplastic cells. I...

Introduction: Lymphoma of the thyroid gland is an uncommon condition occurring primarily in older women. Most patients have a short history of enlarging thyroid or a neck mass causing tracheal compression. There is also a strong association between thyroid lymphoma and Hashimoto’s thyroiditis. The diagnosis is established by biopsy. The conventional approach to treatment is combination of radiation therapy with multi-agent chemotherapy, while there is no significant role ...

CYP11B2 is a key enzyme of primary aldosteronism, and several factors are involved in the regulation of CYP11B2 expression and the overproduction of aldosterone. Somatic mutations in aldosterone-driver genes are strongly associated with CYP11B2 expression and have been only detected in the CYP11B2-positive tumor area, indicating that aldosterone producing adenoma (APA) intratumoral heterogeneity corresponds to non-uniform CYP11B2 expression in neoplastic cells. In addition, CY...

Introduction: The aim of our study was to investigate clinical and morphological features of dopamine agonist-resistant prolactinomas.Methods/design: The study included 51 patients (38 women, 13 men) with prolactin-secreting pituitary adenoma that is resistant to treatment with dopamine agonists, age 15–82 years.Results: Median of the serum PRL level distribution at the onset of the disease was 4500 mIU/l (3480, 140 300). The ...

Background: Papillary thyroid carcinoma (PTC), the most common endocrine malignancy, is a tumor of indolent biological and clinical behaviour that usually has a good prognosis. Only a small percentage of patients are affected by aggressive variants of PTC: tall, columnar cell and diffuse sclerosing variants. These aggressive tumor subtypes are characterized by higher rate of local recurrence, regional and distant metastases than classic papillary PTC. Recently another clinical...