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Background: Spontaneous kidney rupture could develop in the course of posterior urethral valve (PUV), the most common cause of outflow urinary tract obstruction in male infants. However, urinary extravasation is a rare complication among this group of children., Case Presentation: Our case report presents diagnostic difficulties connected with spontaneous kidney rupture due to PUV in a 6 week-old infant. Due to not equivocal images, thundery course of disease and rapid deterioration in the infant's condition, the patient required an urgent laparatomy., Conclusion: This case showed that the investigation of renal abnormalities during early neonatal period, is very important specifically in PUV that can lead to kidney rupture.

Kidney spontaneous rupture is not a recognized complication neither for amyloidosis nor of autologous stem cell transplantation (ASCT). A 46-year-old white woman, affected by nephrotic syndrome, was diagnosed as AL amyloidosis by renal biopsy. We report the singular case of a bilateral spontaneous kidney rupture during ASCT for AL with renal rescue.