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Fundamentals and Symptoms of Megacalycosis
Megacalycosis is the enlargement of the calyceal system without urinary tract obstruction or vesicoureteral reflux, which is caused by a malformation of the renal papillae.
male:female = 6:1
Etiology of Megacalycosis:
Megacalycosis caused by a malformation of the renal medulla with short collecting ducts, the number of calyces is increased.
Pathophysiology of Megacalycosis:
Megacalycosis causes a mild disturbance of the maximum concentration capacity of the kidney, the long term prognosis in relation to renal function is good.
Signs and Symptoms:
In general, no complaints.
Diagnostic Work-Up of Megacalycosis
Intravenous urography shows a enlargement of the pyelocalyceal system and an increased number of calyces. Dilatation of the renal pelvis ist not present, the ureter is slim [fig. megacalycosis in intravenous urography].
Vesicoureteral reflux is not present in voiding cysturethrography.
Normal renal function, prompt washout of the radionuclide.
Megacalycosis: intravenous urography shows an increased number and dilation of the calyces. With kind permission of Dr. G. Antes, Kempten.
Treatment of Megacalycosis
Specific treatment is not necessary.
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Deutsche Version: Megakalikose