Amyloidosis can be present in children, but it is extremely rare, according to Nature.com. This type of amyloidosis is hereditary, which means it is passed down from a parent. It is the result of a mutation in a gene.
One type of childhood amyloidosis affects the kidneys, says Pediatric Nephrology. A child with renal amyloidosis has protein in her urine and presents with nephrotic syndrome. The symptoms of nephrotic syndrome are foamy urine, edema of the face, belly, feet and ankles and poor appetite, states MedlinePlus.
If the child is not treated for renal amyloidosis, she is at risk for chronic kidney failure, claims Pediatric Nephrology. The disease is probably triggered by an inflammatory autoimmune condition, especially a disease called familial Mediterranean fever.