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Benign renal schwannoma: a rare entity

We present a case of a 55-year-old woman who presented with colicky pain on the right side of her abdomen. She had microscopic haematuria while urine cultures were negative. She had no other concomitant gynaecological or gastrointestinal symptoms. An ultrasound revealed normal kidneys apart from a prominent right renal pelvis even on postmicturition images. Non-contrast CT demonstrated a soft tissue density lesion adjoining the right renal pelvis (figure 1). The ureter was not obstructed and passed anterior to this structure. A CT urogram demonstrated mildly enhancing lobulated mass measuring approximately 5.1×4.7×2.4 cm, located outside the renal collecting system (figure 1). The right renal parenchyma was normal and the …