George Kontogeorgos, Eleni Thodou
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 …
Filippo Ceccato, Gianluca Occhi, Daniela Regazzo, Maria Luigia Randi, Diego Cecchin, Marina Paola Gardiman, Renzo Manara, Giuseppe Lombardi, Luca Denaro, Franco Mantero, Carla Scaroni
BACKGROUND: Most pituitary adenomas with FSH- or LH-positive immunohistochemistry are endocrinologically silent, and neurological symptoms due to their large volume are the first clinical signs; they are rarely reported to be secreting gonadotropins, this usually occurring in cases with clinical endocrine findings …