title: Primary carcinoid tumor of kidney. Light and electron microscopy, and immunohistochemical study.
abstract: We present a case of primary renal carcinoid tumor with the appearance of type B carcinoid with trabecular and ribbon-like structure. All the immunohistochemical stains were negative. Electron microscopy revealed numerous cytoplasmic granules with polar distribution and masses of intermediate microfilaments. We believe only 8 cases have been reported in the literature.
mesh_terms: D008841:Actin Cytoskeleton / Q000648:ultrastructure; D000328:Adult; D002276:Carcinoid Tumor / Q000378:metabolism / Q000473:pathology*; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007668:Kidney / Q000378:metabolism / Q000473:pathology; D007680:Kidney Neoplasms / Q000378:metabolism / Q000473:pathology*; D008854:Microscopy, Electron; D013194:Staining and Labeling / Q000379:methods