Fig. 3From: Prolactin-producing pituitary adenoma with atypical spindle cell morphology: a case reportImmunohistochemistry of prolactinoma. Conspicuous fibrous change in tumor confirmed by Masson trichrome stain (a); Pearse’s PAS stain verifying chromophobic tumor cells (b); strong reactivity of tumor cells for PRL, with paranuclear localization (c); tumor cells negative for S-100 protein (d)Back to article page