Myelin outfoldings 2008-03-04T06:41:00Z HP:0007290 This finding can be demonstrated by nerve biopsy (e.g., sural nerve biopsy). Irregular myelin foldings UMLS:C1843168 HP:0006898 HP:0004336 HP:0003433 Excessive focal folding of myelin sheaths The presence of excessive redundant myelin in the peripheral nerve sheath. Peripheral hypermyelination