among 343 surgically-removed pituitary adenomas , 56 tumors were unassociated clinically or biochemically with increased hormone secretion and contained no adenohypophysial hormones by the immunoperoxidase technique , except for 10 cases in which a few scattered cells showed positive immunostaining for beta-tsh or beta-fsh , beta-lh , prolactin and/or alpha-subunit .
C0032000
pituitary adenomas
C0027651
tumors