Editing Pediatrics: Anomalies of the Kidneys (section)

=== Megacalycosis ===
* '''Megacalycosis is defined as nonobstructive enlargement of calyces resulting from malformation of the renal papillae'''
* '''The calyces are generally dilated and malformed and may be increased in number.'''
* '''The renal pelvis is not dilated,''' nor is its wall thickened, and the ureteropelvic junction is normally funneled without evidence of obstruction. The ureter is usually normal.
* '''Occurs predominantly in males''' with a ratio of 6:1 and '''has been found only in Caucasians'''.
* '''Bilateral disease has been seen almost exclusively in males, whereas segmental unilateral involvement occurs only in females'''
* Diuretic renography shows a normal pattern for uptake and washout of the isotope
* Long-term follow-up of patients with this anomaly does not usually show progression of the anatomic or functional status of the kidney