Plexiform neurofibroma in Adult
Synopsis

PNF are associated with neurofibromatosis type I (NF1) and are considered pathognomonic for this condition. A single plexiform neurofibroma is a single criterion for NF1 (at least 2 of 7 criteria are required for diagnosis). About one-fourth of children with NF1 develop PNF. Facial PNF usually appear within the first 3 years of life and often involve the trigeminal nerve.
Unlike cutaneous and subcutaneous neurofibromas, PNF are unaffected by hormonal changes during puberty or pregnancy. PNF may be asymptomatic but may also cause morbidity because of a propensity to infiltrate surrounding tissue. Complications arise from compression of surrounding structures, which can induce pain, neurologic impairment, and motor dysfunction and cause disfigurement. Rarely, PNF can result in death from such complications. PNF carry an approximate 10% risk of developing into malignant peripheral nerve sheath tumors.
Codes
D36.10 – Benign neoplasm of peripheral nerves and autonomic nervous system, unspecified
SNOMEDCT:
403818001 – Plexiform neurofibroma
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