Tubular Urachal Remnants in Adult Bladders

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Abstract
The structure and histologic appearance of intramural tubular urachal remnants were studied in bladders from an unselected series of 122 autopsies, in which the patient age at death was 38-91 yr. The bladders were fixed with formaldehyde introduced 10 min.-5 h post mortem. Of the bladders 32% showed tubular urachal remnants. The remnants were classified into 3 types on the basis of the epithelial extent and structure. Of the remnants 68.4% had lumen covered with transitional epithelium, while the remainder had columnar epithelium. Bud-like epithelial proliferations were found in 43.6%, and mild dysplasia of the epithelium was found in 7.7% of the urachal remnants, while mild inflammation in the loose peritubular tissue was demonstrated in 23.1%.

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