[Acroparesthesias in plexus lesions: clinical aspects and treatment (author's transl)].

The author delimits the so-called brachial dysparesthesias from the "true acroparesthesias", the actual carpal tunnel syndrome. Dysparesthesias may be caused by cervical ribs, the scalenus syndrome and mixed forms of various abnormalities. In addition to a cervical rib, e.g. changes in the costoclavicular joint may be present, or an abnormal position of the subclavian artery. Also, lesions of nerves and vessels may emanate from the neighboring organs, as from vertebral metastases, enlarged lymph nodes etc. Generally, the treatment is conservative temporizing. Only severe cases with a confirmed diagnosis require surgical correction.