Inferior shoulder dislocation, also called luxatio erecta, is the least common type of shoulder joint dislocation. The arm is held in abducted position in inferior shoulder dislocation due to the humeral head stuck under the bony labrum. 

Inferior dislocation can mimic subglenoid anterior dislocation in which the humeral head lies directly below the glenoid process of the scapula in the AP and lateral projections.