case_images: PMC8518622_01
case_images: Magnetic resonance imaging showed a 1.7x1.2 cm cystic lesion with a thickened pituitary stalk and mainly peripheral enhancement (A-D). Intraoperative pictures revealed a soft yellow lesion (E) with pus-like fluid (F). Pathologic examination showed that the pituitary gland was infiltrated by foamy histocytes and lymphocytes (G, x200). The foamy cells were immunopositive for CD68 (H, x200) and immunonegative for CD1a (I, x200) and S-100 protein (J, x200).
case_images: fendo-12-735655-g002.jpg
case_images: PMC8518622_01_fendo-12-735655-g002.jpg
case_images: f2
case_images: A pituitary magnetic resonance imaging (MRI) scan revealed a 1.7x1.2 cm cystic lesion occupying the sella turcica with mainly peripheral enhancement ( Figures 2A-D ). Endoscopic transsphenoidal surgery was performed and displayed a soft yellowish lesion with pus-like discharge ( Figures 2E, F ). Immunohistochemistry of the foamy histiocytes indicated strong staining for CD68 ( Figures 2G-J ).