RT Journal Article T1 Growth hormone-releasing hormone-secreting pulmonary neuroendocrine tumor associated with pituitary hyperplasia and somatotropinoma A1 Lamback, Elisa B. A1 Henriques, Daniel G. A1 Vazquez-Borrego, Mari C. A1 de Azeredo Lima, Carlos H. A1 Kasuki, Leandro A1 Luque, Raul M. A1 Chimelli, Leila A1 Gadelha, Mônica R. K1 Acromegaly K1 Pituitary adenoma K1 Neoplasias hipofisarias K1 Neuroendocrine tumors K1 Hyperplasia K1 Growth hormone-releasing hormone K1 Acromegalia K1 Tumores neuroendocrinos K1 Hiperplasia K1 Hormona liberadora de hormona del crecimiento AB Acromegaly caused by ectopic growth hormone-releasing hormone (GHRH)-secreting tumor is exceedingly rare. We report a case of acromegaly secondary to GHRH secretion by an incidentally diagnosed pulmonary neuroendocrine tumor (NET) and review 47 similar cases in literature. A 22-year-old male patient presented with symptoms of pituitary apoplexy. Magnetic resonance imaging (MRI) showed apoplexy of a pituitary adenoma. Routinely prior to surgery, a chest radiography was performed which revealed a mass in the left lung. During investigation, the patient was diagnosed with metastatic GHRH-secreting pulmonary NET. In retrospect, it was noted that the patient had pituitary hyperplasia 20 months prior to the MRI which showed the presence of a pituitary adenoma. The histological findings confirmed somatotroph hyperplasia adjacent to somatotropinoma. This case suggests that GHRH secretion can be associated with pituitary hyperplasia, which may be followed by pituitary adenoma formation. PB Sociedade Brasileira de Endocrinologia e Metabologia SN 2359-3997 YR 2021 FD 2021 LK http://hdl.handle.net/10668/3912 UL http://hdl.handle.net/10668/3912 LA en NO Lamback EB, Henriques DG, Vazquez-Borrego MC, de Azeredo Lima CH, Kasuki L, Luque RM, et al. Growth hormone-releasing hormone-secreting pulmonary neuroendocrine tumor associated with pituitary hyperplasia and somatotropinoma. Arch Endocrinol Metab. 2021 Oct 29;65(5):648-663 DS RISalud RD Apr 8, 2025