127342

5

Developing papillary necrosis *daw' sign

Analgesic nephropathy

Normal

paprlla

Partial papillary necrosis with sentral caviiation

Papillary

calcification

Features

lnvanably brlaterai disease

Complete papillary necrosrs (ring sign)

Free paprlla at

peto-uretenc

junclion

Papillary necrosis tn situ

Wavy outlines to kidneys Scamng lateral and polar