title: Prostatic intraepithelial neoplasia: a lesion that may be confused with cancer on prostatic ultrasound.
abstract: Most prostatic adenocarcinomas reveal a hypoechoic peripheral zone lesion on transrectal ultrasonography. Numerous benign processes can have similar transrectal ultrasound findings. We report 8 cases of transrectal ultrasound-guided prostatic biopsies of peripheral zone hypoechoic lesions that demonstrated prostatic intraepithelial neoplasia, a presumed premalignant lesion. Immunohistochemistry using an antibody directed against cytokeratins 5 and 14 was performed to exclude carcinoma. Of the men 2 had invasive carcinoma on repeat biopsy and 1 had carcinoma diagnosed on subsequent transurethral resection. Patients with prostatic intraepithelial neoplasia on biopsy of hypoechoic peripheral zone lesions merit careful monitoring.
authors: Department of Surgery, University of Arizona, Tucson.
authors: M K
authors: MK
authors: Brawer
authors: M A
authors: MA
authors: Rennels
authors: R B
authors: RB
authors: Nagle
authors: M H
authors: MH
authors: Soiderer
authors: F
authors: F
authors: Lee
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D000911:Antibodies, Monoclonal; D001706:Biopsy; D003937:Diagnosis, Differential; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000276:immunology; D008297:Male; D011467:Prostate / Q000378:metabolism / Q000473:pathology*; D011470:Prostatic Hyperplasia / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D014463:Ultrasonography
chemical_list: D000911:Antibodies, Monoclonal; D007633:Keratins