Dejerine-Klumpke paralysis is paralysis of the muscles of the hand and a violation of sensitivity on the inner surface of the shoulder and forearm , developing as a result of damage to the lower parts of the brachial plexus. Etiology: Dezherin-Klumpke paralysis occurs in trauma (traction, rupture of the nerve roots or compression of their hematoma, dislocation of the shoulder ), with compression of the nerve roots by a tumor, less often as a result of infection. The disease is manifested by paralysis of the hand muscles with movement disorder in the little finger, atrophy of the thumb and intercostal muscles of the hand, loss of sensitivity on the inner surface of the shoulder and forearm, Horner's syndrome (constriction of the pupil and palpebral fissure, retraction of the eyeball). Prognosis and therapy are determined by the cause of the disease. See also Duchenne - Erb paralysis.