[Hereditary neuropathy with tendency to pressure palsies (HNPP) in a child: clinical and biological diagnosis. A case report].
HNPP occurs rarely but not exceptionally during childhood.


METHODS
José M., seven years old, presented an isolated radial nerve palsy of progressive onset with no other clinical feature. There was no family history of neurological disorder. The electromyogram (EMG) showed a 'mosaic-like' pattern of extended sensitive and motor alterations, with diminished conduction velocities and amplitudes and increased distal latencies. HNPP was considered through the association of an isolated radial nerve palsy with an asymptomatic polyneuropathy, and was confirmed by molecular biology.


CONCLUSIONS
HNPP is generally considered on clinical features, heredity and EMG findings. Molecular biology confirms the diagnosis in most of the cases, even in apparently sporadic patients, and is of great interest in atypical cases.
Lesca
G
G
Service de pédiatrie, Centre hospitalier de Roanne, France.
Meunier
S
S
Zine
A
A
Jeannoël
P
P
Latour
P
P
Vandenberghe
A
A
D002648:Child; D003937:Diagnosis, Differential; D004576:Electromyography; D006801:Humans; D008297:Male; D010523:Peripheral Nervous System Diseases / Q000175:diagnosis / Q000235:genetics / Q000473:pathology*; D011115:Polyneuropathies / Q000175:diagnosis / Q000235:genetics / Q000473:pathology*; D011312:Pressure; D011826:Radial Nerve / Q000473:pathology*