Other very rare histological types of PRL that have been described in the literature, including Burkitt, lymphoblastic, lymphocytic, mucosa-associated lymphoid tissue, anaplastic follicular lymphoma, T-cell lymphoma, Hodgkin’s lymphoma, and intravascular large B-cell lymphoma.7,8,18,24,27-31 Primary renal pelvis and ureteral lymphomas are extremely rare.31 Mucosa-associated lymphoid tissue lymphoma is a relatively common lymphoma in the renal pelvis and ureter. The gene discussed is PRL; the disease is lymphoma.