[In infantile systemic hyalinosis,] Hypoproteinemia may result in generalized edema. Intestinal lymphangiectasia and hyaline deposits are evident on jejunal biopsy. This is associated with protein-losing enteropathy. Hypoproteinuria may result in generalized edema. Serum protein, but especially serum albumin, is low. Bloody diarrhea may be noted.
Source: wiktionary
[Adverse effects of a ketogenic diet as an antiepileptic treatment include] Dehydration during initiation phase, GI [gastrointestinal] complaints (nausea, vomiting, diarrhea); ketogenic diet predisposes to metabolic acidosis; metabolic complications (hyponatremia, hypomagnesemia, hypoproteinuria, hyperuricemia); renal stones occur in <5% of patients; rare but life-threatening pancreatitis and cardiomyopathy.
Source: wiktionary
Diabetic nephropathy is one of the main etiologies of renal failure, described by proteinuria above 500 mg within 24 hours of diabetes onset, but this is followed by hypoproteinuria, or "microalbuminuria". This phenomenon is frequent to both types of diabetes.
Source: wiktionary