Disappearance of a growth hormone secreting macro adenoma during long-term somatostatin analogue administration and recurrence following somatostatin withdrawal

Sarantis Livadas, Dimitrios J. Hadjidakis, Maria I. Argyropoulou, Maria Stamatelatou, Dimitrios Kelekis, Sotirios A. Raptis

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Acromegaly is caused by excessive growth hormone secretion, usually from a pituitary adenoma. The use of somatostatin analogues as primary or adjunctive therapy has been widely applied in the management of acromegaly. We are aware of only three reported cases of complete shrinkage of a pituitary adenoma after long-term analogue administration…

The gonadotroph origin of null cell adenomas

George Kontogeorgos, Eleni Thodou

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OBJECTIVE: The term “null cell” adenoma was first proposed in 1980 to designate pituitary adenomas lacking clinical, biochemical and morphological markers to disclose their cell origin. DESIGN: The aim of this study was to investigate the presence of α- and β-gonadotropin subunits in clinically nonfunctioning pituitary tumors …