Antero-inferior paralabral cyst of the shoulder: An atypical cause of rapidly evolving axillary and musculocutaneous nerve palsy.

ABSTRACT: Paralabral cysts of the shoulder are a rare cause of shoulder pain. Their association with neurological symptoms is uncommon. This case report presents an antero-inferior paralabral cyst in a painful atraumatic shoulder causing axillary and musculocutaneous nerve palsy. The patient in the present study showed a rapidly worsening active shoulder function with dull pain in the posterior shoulder and hypoesthesia over the deltoid. Magnetic resonance imaging revealed an antero-inferior paralabral cyst. Electromyography showed a profuse denervation of the deltoid, teres minor and biceps brachii muscles. The patient was diagnosed with a axillary and musculocutaneous nerve compression neuropathy caused by the cyst. Shoulder arthroscopy was performed with the goal of decompressing the cyst and exp

SUBMITTER: Klumpp R 

PROVIDER: S-EPMC7394793 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature