Muellerianosis of the urinary bladder, endocervicosis type : A case report

This case reports muellerianosis of the urinary bladder, showing glandular lesions made up of endocervical type glands, in a 36-yr-old woman. The pati ent presented with lower abdominal discomfort and pain on voiding. The pati ent had undergone two Cesarean sections 5 yr and 3 yr earlier. On a pelvic ultrasonography, a well-circumscribed mass, 2.2 x 0.8 cm in dimension, was found with luminal polypoid projection in the posterior wall of the urinary bladder. The patient had a transurethral resection of the bladder mass. Hi stologically, the tumor was composed of irregularly shaped glands lined by endocervical mucous epithelium in the muscularis propria of the urinary bla dder. Some glands exhibited cystic dilatation and contained mucinous secret ions. The glands elicited no desmoplastic tissue reaction. The intraluminal mucin often contained polymorphonuclear leukocytes. The glands were mostly lined by tail columnar and bland looking mucous cells with mucin secretion . The ciliated cells were rarely observed. No endometrial component is note d. It would be appropriate to designate this lesion as "Muellerianosis of t he urinary bladder, endocervicosis type". Awareness of the lesion and atten tion to its typical histologic features should facilitate its crucial disti nction from adenocarcinoma.