The nested variant of urothelial carcinoma arising in a fibroepithelial polyp: Report of a case and review of literature.
The nested variant of urothelial carcinoma is a rare but very important histological entity due to its deceptively bland-looking appearance and aggressive behavior. We present a case of a 30-year-old man who was found to have a solitary polypoid growth in the bladder. It was resected and found to be a fibroepithelial polyp; a rare entity in itself, harboring the above tumor. The lesion also showed a second population of scattered bizarre stromal cells. To our knowledge, this is the first instance of a nested variant of urothelial carcinoma arising in a fibroepithelial polyp. The presence of atypical stromal cells has also not been described previously.
Department of Histopathology, Shifa International Hospital, Islamabad.
Nadira
N
Mamoon
Department of Histopathology, Shifa International Hospital, Islamabad.
Zujajah
Z
Hameed
Department of Histopathology, Shifa International Hospital, Islamabad.
Fazal
F
Ilahi
Department of Histopathology, Shifa International Hospital, Islamabad.
Imran Nazir
IN
Ahmad
Fibroepithelial polyp; nested variant; urinary bladder; urothelial carcinoma