WASTING OF SMALL MUSCLES OF HAND

(classified according to whether unilateral or bilateral)

bilateral:

old age

rheumatoid arthritis

motor neurone disease

bilateral cervical ribs

syringomyelia

bilateral median or ulnar nerve lesions

unilateral:

cervical cord lesions, eg. tumour

brachial plexus trauma (T1 lesions)

Pancoast tumour (involves T1)

cervical rib

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click here for a classification according to site of pathology

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