Preschooler with a cystic left renal mass Pediatric Imaging Surgical-Pathological-Clinical December 30, 2022October 17, 2022 Gross pathological image (left) and sectioned gross pathological image (right) shows a mass composed of multiple cysts separated by thin septae. The diagnosis was pediatric cystic nephroma. Related Published December 30, 2022October 17, 2022