title: Granulomatous prostatitis due to Cryptococcus neoformans: diagnostic usefulness of special stains and molecular analysis of 18S rDNA.
abstract: A 57-year-old Japanese man complained of pain on micturition. The prostate was of normal size but hard. Transrectal needle biopsy demonstrated granulomatous prostatitis with small focal abscesses. Staining with periodic acid-Schiff, Grocott's methenamine silver and Fontana-Masson revealed yeast-form fungus in the granulomas. The mucoid capsule of the fungus stained with mucicarmine. PCR specific for cryptococcal 18S rDNA using DNA extracted from the pathological specimen was positive, and the sequence was homologous to Cryptococcus neoformans. A diagnosis of cryptococcal granulomatous prostatitis was made. The patient was then found to suffer from meningitis and lung abscess, and was treated with amphotericin B and flucytosine. Careful histological and molecular studies are beneficial to reach the correct diagnosis and to prevent an unfavorable outcome of disseminated cryptococcosis.
authors.affiliation: Department of Pathology and Molecular Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan. ryuichi@cc.hirosaki-u.ac.jp
authors.forename: R
authors.initials: R
authors.lastname: Wada
authors.forename: N
authors.initials: N
authors.lastname: Nakano
authors.forename: N
authors.initials: N
authors.lastname: Yajima
authors.forename: T
authors.initials: T
authors.lastname: Yoneyama
authors.forename: Y
authors.initials: Y
authors.lastname: Wakasaya
authors.forename: C
authors.initials: C
authors.lastname: Murakami
authors.forename: K
authors.initials: K
authors.lastname: Yamato
authors.forename: S
authors.initials: S
authors.lastname: Yagihashi
mesh_terms: D000038:Abscess / Q000175:diagnosis / Q000382:microbiology* / Q000473:pathology; D000666:Amphotericin B / Q000627:therapeutic use; D000935:Antifungal Agents / Q000627:therapeutic use; D002329:Carmine; D004396:Coloring Agents; D003453:Cryptococcosis / Q000175:diagnosis* / Q000188:drug therapy; D003455:Cryptococcus neoformans / Q000235:genetics / Q000302:isolation & purification*; D004271:DNA, Fungal / Q000235:genetics / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000235:genetics / Q000302:isolation & purification; D004359:Drug Therapy, Combination; D005437:Flucytosine / Q000627:therapeutic use; D006099:Granuloma / Q000175:diagnosis / Q000382:microbiology* / Q000473:pathology; D006801:Humans; D008172:Lung Diseases, Fungal / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology; D008297:Male; D016919:Meningitis, Cryptococcal / Q000175:diagnosis / Q000188:drug therapy; D008709:Methenamine; D008875:Middle Aged; D010503:Periodic Acid-Schiff Reaction; D011472:Prostatitis / Q000175:diagnosis / Q000382:microbiology* / Q000473:pathology; D012331:RNA, Fungal / Q000235:genetics*; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D021521:Ribotyping; D012835:Silver Nitrate; D013194:Staining and Labeling / Q000379:methods*
chemical_list: D000935:Antifungal Agents; D004396:Coloring Agents; D004271:DNA, Fungal; D004275:DNA, Ribosomal; C051037:Fontana-Masson stain; D012331:RNA, Fungal; D012337:RNA, Ribosomal, 18S; C029618:mucicarmine; D000666:Amphotericin B; D012835:Silver Nitrate; D002329:Carmine; D005437:Flucytosine; D008709:Methenamine