Female ; Humans ; Infant ; Mutation ; Pain Insensitivity, Congenital ; complications ; genetics ; pathology ; Receptor, trkA ; genetics

Congenital insensitivity to pain with anhidrosis (CIPA) is a very rare genetic disorder of the peripheral nervous system characterized by recurrent episodes of unexplained fever, generalized anhidrosis, insensitivity to pain and temperature, and accompanied by self-mutilating behavior and mental retardation. We report on a 16 month-old boy with CIPA who exhibited these characteristic clinical features. A sural nerve biopsy revealed markedly reduced numbers of unmyelinated and small myelinated fibers, consistent with the characteristic features of CIPA.
Atrophy ; Case Report ; Fingers ; Human ; Hypohidrosis/pathology* ; Hypohidrosis/complications ; Infant ; Korea ; Male ; Mental Retardation/pathology ; Mental Retardation/complications ; Microscopy, Electron ; Nerve Fibers/ultrastructure ; Nerve Fibers/pathology ; Pain Insensitivity, Congenital/pathology* ; Pain Insensitivity, Congenital/complications ; Self Mutilation/pathology ; Self Mutilation/etiology ; Sural Nerve/pathology ; Tongue