High Grade Mucinous Urothelial Carcinoma of the Renal Collecting System: A Case Report

Abstract

High grade mucinous urothelial carcinoma is a rare pathological variant. There is still controversy as to its nomenclature and classification. We report the case of a 64 year old female with history of pelvic pain who was incidentally discovered to have a left upper pole renal mass. Left nephroureterectomy was performed and histopathological examination revealed high grade mucinous urothelial carcinoma. Accurate diagnosis of this distinct pathological entity will allow for better understanding of phenotypic behavior and inform best treatment strategies.

Cytological and histological findings of upper tract mucinous urothelial carcinoma with clear cell component: A case report and review of literature

“…Ting et al reported a case report and literature review of bladder UC with abundant myxoid stroma in 2020 5 . Only two cases of mucinous UC which originated in the upper urinary tract were reported in 2014 and 2018 6,7 . The clinicopathological features of 19 cases including the present case are summarized in Table 1.…”

“…5 Only two cases of mucinous UC which originated in the upper urinary tract were reported in 2014 and 2018. 6,7 The clinicopathological features of 19 cases including the present case are summarized in Table 1. The population of mucin is quite different depends on cases.…”

“…2 Mucinous UC is a rare variant and only 18 cases of mucinous UC originating from upper and lower urinary tract have been reported. [2][3][4][5][6][7] However, there was a few detailed descriptions about cytological findings of…”

“…Mucinous carcinoma, commonly encountered in the breast or gastrointestinal tract, is extremely rare in the bladder or upper urinary tract 2 . Mucinous UC is a rare variant and only 18 cases of mucinous UC originating from upper and lower urinary tract have been reported 2–7 . However, there was a few detailed descriptions about cytological findings of mucinous UC among them.…”