Inflammatory Myofibroblastic Tumor Masquerading as Congenital Pelvic-ureteric Junction Obstruction.

Inflammatory myofibroblastic tumor (IMT) is a very rare tumor with still rare occurrence in the genitourinary system, presenting as a pelvic-ureteric junction (PUJ) obstruction (PUJO). We report a case of IMT at the PUJ mimicking congenital PUJO and review the relevant literature.