Spontaneous renal pelvic haematoma mimicking cancer in IgA nephropathy.

Common causes of gross haematuria include stones, neoplasms, tuberculosis, trauma and prostatitis. However, macroscopic haematuria can occur in patients with IgA nephropathy. IgA nephropathy usually occurs in patients under 40 years of age, and loin pain often accompanies the haematuria [1]. Furthermore, macroscopic haematuria in IgA nephropathy often causes acute renal failure because of tubular obstruction by red blood cells [2–4]. Obstruction or haematoma of the renal pelvis and lower urinary tract by gross haematuria in IgA nephropathy or any other diseases causing haematuria has not been reported. Here, we report the case of a patient with pelvic haematoma in IgA nephropathy, that was erroneously suspected for pelvic malignancy leading to its radical resection.