In vivo detection by microscopic chromocystoscopy of concurrent urothelial atypia in superficial bladder cancer.
Microendoscopic observation of methylene blue-stained urothelial surfaces, so-called microscopic chromocystoscopy (MCC), was undertaken in 65 patients with superficial bladder cancer (Ta and T1) and its effectiveness in detecting concurrent urothelial dysplasia or carcinoma in situ was studied. A total of 166 biopsy samples were taken from 75 stained and 91 non-stained portions. Of 75 methylene blue-stained areas, 21 were judged to be abnormal (MCC-positive) by microscopic observation. Fourteen of these 21 MCC-positive areas (67%) were proven to be abnormal histologically, while 7 of 54 MCC-negative portions (13%) were histologically abnormal. Only 4 of 91 biopsies (4%) from non-stained mucosa were proven to have urothelial atypia. In per patient figures, 1 or more concurrent field changes were detected in 15 of 65 cases (23%). MCC contributed to the diagnosis in 10 of these 15 patients.
Iguchi
A
A
Department of Surgery, Saga Medical School, Japan.
Kinoshita
N
N
Masaki
Z
Z
D000368:Aged; D000369:Aged, 80 and over; D002278:Carcinoma in Situ / Q000473:pathology*; D002295:Carcinoma, Transitional Cell / Q000473:pathology*; D003558:Cystoscopy / Q000379:methods*; D004848:Epithelium / Q000473:pathology; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008297:Male; D008751:Methylene Blue; D008875:Middle Aged; D001743:Urinary Bladder / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000473:pathology*
D008751:Methylene Blue