KIDNEY - Nephroblastoma (Wilms' tumour)

Tumour with renal outline; on posterior surface a short length of ureter is seen. Kidney is replaced in lower pole by solid tumour, and in upper half by cystic tumour in which there are areas of haemorrhage.
Child, aged 6 months, presented with large left abdominal mass. Investigation confirmed large solid mass in position of left kidney. She was subsequently treated by chemotherapy, and at age of 18 months was well.