Synonyms of Neuropathy, Hereditary Sensory, Type IV
- Familial Dysautonomia, Type II
- Hereditary Sensory and Autonomic Neuropathy IV
- HSAN IV
- HSN IV
- Insensitivity to Pain, Congenital, with Anhydrosis; CIPA
- Neuropathy, Congenital Sensory, with Anhydrosis
Disorder SubdivisionsGeneral Discussion
The hereditary sensory neuropathies (HSN) include 4-6 similar but distinct inherited degenerative disorders of the nervous system (neurodegenerative) that frequently progress to loss of feeling, especially in the hands and feet. The classification of these diseases is complicated, and sometimes a source of disagreement among the experts.
Hereditary sensory neuropathy type IV (HSN4) is a rare genetic disorder characterized by the loss of sensation (sensory loss), especially in the feet and legs and, less severely, in the hands and forearms. The sensory loss is due to abnormal functioning of small, unmyelinated nerve fibers and portions of the spinal cord that control responses to pain and temperature as well as other involuntary or automatic body processes. Sweating is almost completely absent with this disorder. Mental retardation is usually present.
The disorder is inherited as an autosomal recessive trait. The gene involved is located on chromosome 1.
HSNs of various types may attack a single nerve (mononeuropathy) or many nerves simultaneously (polyneuropathy). The resulting symptoms may involve sensory, motor, reflex, or blood vessel (vasomotor) functions.Organizations related to Neuropathy, Hereditary Sensory, Type IV
- Jack Miller Center for Peripheral Neuropathy
University of Chicago
Chicago IL 60637
Phone #: 773-702-5800
800 #: N/A
e-mail: [email protected]
Home page: http://millercenter.uchicago.edu
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders, Inc. ? (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html