Disorders of the Shoulder: The Daily PANCE Blueprint

The answer is E. Lightbulb sign

Shoulder dislocation is the most common type of joint dislocation; it can happen posteriorly, inferiorly, and anteriorly (MC). Posterior dislocations typically occur during seizures or electrical shocks. Clinical features include pain, palpable dent, and limited ROM. X-ray is the best initial diagnostic test. An interesting clue is that a circular appearance of the humeral head (aka “light bulb sign”) is a sign of a posterior dislocation. Management of an uncomplicated dislocation is closed reduction – and then immobilization with prn pain medications. Surgery is indicated in specific cases.