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• W3159477488 abstract "Abstract Acromegaly is rarely due to an excess of the GH-releasing hormone (GHRH) and pituitary hyperplasia on histology should alert to its presence. Clinical Case: A 35-year-old was referred to surgery with a confirmed diagnosis of symptomatic acromegaly. Her GH failed to suppress during an oral glucose tolerance test (OGTT), her IGF-1 and prolactin was high. Her serum calcium was normal and her chromogranin B was high. MRI scan suggested microadenoma. Her surgery was deferred because of Covid 19, and she was treated with somatostatin analog (SSA). She finally had surgery in July. The histology and immunocytochemistry suggested pituitary hyperplasia with diffuse positivity for chromogranin and synaptophysin. GH was positive in the majority of the cells with many cells positive for Prolactin and ACTH. FSH and LH were positive in scattered cells with patchy positivity of TSH. A solitary nodule was noted in her neck during an examination. We arranged to look for conditions associated with pituitary hyperplasia resulting in GHRH production, including the genetic tests for inherited conditions. Her calcitonin level was normal. She had an ultrasound scan guided fine needle aspiration of the thyroid nodule, this showed Thy3f oncocytic nodule with no features of medullary thyroid carcinoma. She had an NMGa68DOTATATE whole body PET CTand the scan showed a large DOTATAE avid mass from the right adrenal gland compatible with Pheochromocytoma. Her 24 hours total urinary metadrenaline and normetadrenalin was high. Her genetic test for MEN1, CDKN1B, and MEN2 are negative. We have requested the GHRH measurement. After a pituitary surgery, her GH suppressed adequately on OGTT. Her IGF-1 and prolactin is low and her hypogonadism is resolved. Conclusion: Excess production GHRH can result from neuroendocrine tumors of the lung, pancreas, thyroid (medullary thyroid cancer), or pheochromocytomas and hypothalamic gangliocytomas. Several familial syndromes, multiple endocrine neoplasia type 1 (MEN1) and 4 (MEN4), familial isolated pituitary adenoma (FIPA), Carney complex, and sporadic germline mosaic disorder McCune-Albright disease predispose to pituitary hyperplasia. GHRH acromegaly should be suspected in a patient with biochemical/clinical features of acromegaly in the presence of co-existing neuroendocrine tumors when there is diffuse pituitary enlargement on imaging or resolution of acromegaly after the surgical resection of the primary neuroendocrine tumour or persistent acromegaly after surgery if there is histological evidence of somatotroph hyperplasia. References: Akirov A, ASA SL, AMER L Shimon I and Ezzat S. The clinicopathological spectrum of acromegaly. J. Clin. Med. 8(11), 1962 (2019) J. Clin. Med. 2019; 8: 11, 1962" @default.
• W3159477488 created "2021-05-10" @default.
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• W3159477488 date "2021-05-01" @default.
• W3159477488 modified "2023-09-25" @default.
• W3159477488 title "Acromegaly in a Young Women With Pituitary Hyperplasia Secondary to a Neuroendocrine Tumor" @default.
• W3159477488 doi "https://doi.org/10.1210/jendso/bvab048.1161" @default.
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