POTTER CLASSIFICATION OF CYSTIC RENAL DISEASE

Type 1	Infantile (autosomal recessive) polycystic disease of kidney.
Type II IIA IIB	Multicystic renal dysplasia. Multilocular cystic nephroma. Kidneys of normal / increased size. Kidneys reduced in size.
Type III	Adult polycystic disease of the kidneys. Tuberous sclerosis. Medullary sponge kidney.
Type IV	Small cortical cysts / cystic renal dysplasia secondary to ureteropelvic junction obstruction.

REFERENCES

1. Osathanondh V, Potter EL. Pathogenesis of polycystic kidneys. Arch Pathol 1964;77:459-512.