Progressive myoclonic epilepsies are a devastating group of rare disorders. The case of a young man who presented with a late-diagnosed nephrotic syndrome, progressive myoclonic seizures with action myoclonus, is described in the present report. He was the fifth child of a consanguineous marriage, and there was no familial history of nephrotic syndrome or end-stage renal failure. Renal biopsy showed focal segmental glomerulosclerosis with collapsing glomerulopathy. The patient died at 25 years of age in a context of end-stage renal function consistent with nephrotic syndrome.