In the perinatal and postnatal periods, causes include trauma, anoxia, intracranial haemorrhage, tumour, infection and prolonged seizures.
在围产期以及产后期，病因包括创伤、缺氧、颅内出血、肿瘤、感染以及持续性癫痫。
2
The reasons of Renal Cyst occur still unconfirmed, may occur from congenital glomerular, renal tubular structure anomalies and postnatal damage infection.