Primary non-Hodgkin lymphoma of kidney and ureter mimicking an upper tract urothelial carcinoma: A case report.

Primary renal lymphoma (PRL) is a rare event, while ureteric involvement by the lymphoma mimicking an UTUC is even rarer. A 30-year-old woman diagnosed for a 6-month history of right flank pain with presumed the UTUC of the right kidney. She underwent radical nephroureterectomy with bladder cuff excision, which reveals the infiltrating papillary mass of the ureter from the proximal region towards the ureterovesical junction. Kidney mass was found mostly solid in the parenchymal region, renal hilus was found adherent towards the wall of the inferior vena cava in which it reveals a similar pathology result of Non-Hodgkin's lymphoma.