title: Immunohistochemical and ultrastructural studies of intraluminal crystalloids in human prostatic carcinomas.
abstract: Intraluminal crystalloids (ICr) observed in 19 cases of incidental or invasive human prostatic carcinoma (PCa) and in a case of benign prostatic hyperplasia were examined extensively by immunohistochemistry and electron microscopy. They were brilliantly eosinophilic with haematoxylin and eosin, manifesting needle-like, triangular, rectangular, hexagonal and irregular lump-like in shape. They were strongly positive, dark blue, with phosphotungstic acid -haematoxylin (PTAH) stain in all cases examined. Among the human antibodies tested, epithelial membrane antigen (EMA) gave specifically positive immunostainability with ICr in all cases. Annual ring-like lamellar or concentric structures were detected by electron microscopy. Positive staining of ICr with PTAH and anti-EMA antibody is very useful as a diagnostic marker for PCa in human prostatic tissues.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis; D006416:Hematoxylin; D006801:Humans; D007150:Immunohistochemistry; D002479:Inclusion Bodies / Q000737:chemistry / Q000378:metabolism / Q000648:ultrastructure*; D008297:Male; D008562:Membrane Glycoproteins / Q000032:analysis / Q000378:metabolism; D008854:Microscopy, Electron; D008875:Middle Aged; D018396:Mucin-1; D010772:Phosphotungstic Acid; D011470:Prostatic Hyperplasia / Q000175:diagnosis / Q000378:metabolism / Q000473:pathology; D011471:Prostatic Neoplasms / Q000737:chemistry / Q000175:diagnosis / Q000648:ultrastructure*
chemical_list: D014408:Biomarkers, Tumor; D008562:Membrane Glycoproteins; D018396:Mucin-1; D010772:Phosphotungstic Acid; D006416:Hematoxylin