title: [Studies on biological characteristics of transitional cell carcinoma of the bladder in patients under 30 years of age].
abstract: The incidence of transitional cell carcinoma (TCC) of the bladder has been increasing in men with a peak incidence occurring in the sixth decade. However, development of tumors under the age of 30 is relatively rare. In this regard, it has been reported that vesical tumors in the young group is less malignant and rare to recur when compared with those in the elderly group. Recently, flow cytometric DNA histograms (FCM) provides quantitative and objective informations for detection and evaluation of malignant potential of bladder neoplasms. Here we report patients with tumor of the bladder under 30 years old and assess the clinical properties and biological characteristics of their tumors based on FCM. A total of 11 patients from 1975 through 1988 were reviewed. Their mean age at the diagnosis was 22.6 years old (range from 22 to 29 years old). Male/female ratio was 2.7:1. The mean follow-up period was 4 years and 7 months (range from 8 months to over 13 years). An asymptomatic gross hematuria was found in all of the patients, which is the most common sign. Filling defects of the bladder on excretory urograms were observed in six out of the 11 patients (54.5%). Cystoscopically, the size of tumors was less than 2 cm in diameter. Ten patients had a single tumor and one patient had multiple tumors at the time of the initial diagnosis. Endoscopically tumors were papillary in all but one patient, who had a non-papillary tumor. Their urine cytology showed class I in one, class II in eight, class III in one, class IV in one and class V in none.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.forename: H
authors.initials: H
authors.lastname: Asakura
authors.forename: M
authors.initials: M
authors.lastname: Tachibana
authors.forename: S
authors.initials: S
authors.lastname: Baba
authors.forename: N
authors.initials: N
authors.lastname: Deguchi
authors.forename: S
authors.initials: S
authors.lastname: Jitsukawa
authors.forename: M
authors.initials: M
authors.lastname: Hata
authors.forename: H
authors.initials: H
authors.lastname: Tazaki
mesh_terms: D000328:Adult; D000782:Aneuploidy; D002295:Carcinoma, Transitional Cell / Q000032:analysis / Q000473:pathology*; D004273:DNA, Neoplasm / Q000032:analysis; D005260:Female; D005434:Flow Cytometry; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D001749:Urinary Bladder Neoplasms / Q000032:analysis / Q000473:pathology*
chemical_list: D004273:DNA, Neoplasm