Endocrine Abstracts

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Pituitary adenohypophyseal tumors are considered benign and termed “adenomas” but can also be invasive, “aggressive” and malignant with metastases (carcinoma). Taking into account this variability in behavior and the oncological definition, pathologists have proposed changing the term adenoma to tumor. Indeed, “tumor designates a neoplasm which is benign or malignant”. The invasion of the surrounding tissues is a criterion of malignancy. For this ...

Gonadotroph adenomas are usually detected by their local mass effects. Spontaneous ovarian hyperstimulation syndrome (OHS) has rarely been described as the main manifestation of gonadotroph adenomas in young women. We present a case with a prolonged OHS occurring during IVF ovarian induction leading to the discovery of a FSH pituitary tumour.Case report: A 36 year-old, normal weight woman with 2 years primary infertility linked to oligomenorrhea and anov...

Background: Gigantism is a rare condition with accelerated growth in childhood when the epiphyseal plates are not fused. Most cases are due to growth hormone (GH) secretion from a pituitary adenoma. Rarer causes of GH-related gigantism include somatotroph hyperplasia as part of McCune-Albright syndrome, Carney complex, X-linked acrogigantism or ectopic GHRH production.Case presentation: An 18-year-old male with c.249_252delGTCT;p.I85Sfs MEN1 mut...

Objective: To collect clinical and treatment outcome data in a large patient cohort, and specifically to report experience with temozolomide (TMZ).Design: Cohort study based on an electronic survey open for participation to ESE members Dec 2015-Nov 2016.Results: Reports on 167 patients, 40 pituitary carcinomas, and 127 aggressive pituitary tumours were obtained. Median age at diagnosis was 43 (range 4–79) years. 59% of tumours...

We present a case of a patient with a locally invasive, serotonin- and ACTH-reactive tumour in the sellar region, filling the sphenoid sinus and expanding into the epipharynx. Clinical examination completed by 68-Gallium-DOTA-TOC PET revealed tracer uptake in the sellar tumour as well as in a 7 mm lesion in the pancreatic tail. A differential diagnosis between silent corticotroph adenoma and another primary or secondary neuroendocrine tumour (NET) with ACTH-expression was diff...

Introduction: Silent somatotroph tumours are GH immunoreactive (IR) pituitary tumours without clinical and biological signs of acromegaly. In our series, they represent 16% of all the somatotroph pituitary tumours. The aim of our study was to compare the somatotroph tumours with and without acromegaly to a better characterization of these silent tumours.Materials and methods: Fifty-nine tumours with acromegaly and 21 silent somatotroph tumours were studi...

Introduction: In the era of personalized patient management in acromegaly, transsphenoidal surgery remains a treatment of choice in cases where surgical cure can be expected. In order to better target these patients and to assess the risk of persistence/progression disease, we evaluated clinical, hormonal, radiological and pathological predictors of surgical outcome in acromegaly.Methods: A single-institution retrospective study from 2009 to 2015 was per...

Introduction: 15% of pituitary tumors are considered as aggressive based on resistance to conventional treatment. Less than 40% of these cases respond to temozolomide treatment underlining the need for new therapeutic options. The PI3K/Akt/mTOR pathway, upregulated in different pituitary tumors subtypes, can be targeted by different drugs in particular BKM 120, a pure PI3K inhibitor, and BEZ235, a dual PI3K/mTOR inhibitor.Objective: To study the anti-tum...

Background: Medical treatment of pituitary adenomas with somatostatin analogs depends on tumor type and somatostatin receptor expression. Using polyclonal antibodies, their immunohistochemical (IHC) detection gave conflicting results. Therefore, we studied the IHC expression of SSTR2A and SSTR5 using two specific MABs in five types of pituitary adenomas.Methods: SSTR2A and SSTR5 expression was studied using two...