[Nerve compression syndromes of the upper extremity exemplified by rare lesions].

By means of three not so common nerve compression lesions the authors comment diagnostics, indication and timing of operation. The indication for operation is given by clinical features and the course of disease. The technical findings, e.g. electromyography and electroneurography are just of supporting value. One should remember that there are not always pathologic findings in nerve compressions. By means of several own cases of suprascapular nerve entrapment, interosseous-anterior-syndrome and entrapment of the posterior interosseous nerve in the arcade of Frohse anatomical findings, clinical items, differentialdiagnosis and operative treatment are demonstrated.