Newborn with a solid renal mass diagnosed on prenatal ultrasound Pediatric Imaging Surgical-Pathological-Clinical December 29, 2022October 17, 2022 Gross pathological image shows a light tan to yellow colored tumor mass situated within the lower pole of the kidney which has a fibrous, whorled cut section reminiscent of a leiomyoma. The diagnosis was mesoblastic nephroma. Related Published December 29, 2022October 17, 2022