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An unusual urachal lesion, which is a mucinous adenocarcinoma arising in a giant urachal cyst and is associated with pseudomyxoma peritonei and stromal osseous metaplasia of the cyst wall, was examined in a 45-year-old male. The cyst was encapsulated, measured 22 x 20 x 20 cm and weighed 3800 g. The
A case of 14-year-old girl is reported who presented with features of tuberculous subacute intestinal obstruction. Exploratory laparotomy revealed a urachal cyst associated with pseudomyxoma peritonei (PMP). Histopathology confirmed a moderately differentiated mucin secreting adenocarcinoma of
A 77-year-old man was diagnosed with urachal cyst, but had not been followed-up because of his severe dementia. He visited our department complaining of mucinuria. Ultrasonography showed a tumor with heterogeneous contents above the bladder. Mucinousfluid was found by cystoscopic examination. After