Reverse Hill-Sachs lesion is best described as which of the following?

Reverse Hill-Sachs lesion is best described as which of the following?

• A. Compression fracture of anterosuperomedial side of the humeral head causing posterior shoulder instability.
• B. Compression fracture of posterosuperior humeral head causing anterior dislocation.
• C. Fracture of the coracoid process.
• D. Fracture of the glenoid rim without humeral head involvement.

Answer: (A)

The key idea is that a reverse Hill-Sachs lesion is an impression (compression) fracture of the anteromedial portion of the humeral head caused by a posterior dislocation of the shoulder. When the humeral head is driven backward, the anteromedial region impacts against the posterior glenoid rim, creating this dent. Clinically, this lesion can contribute to posterior shoulder instability if it engages during movement or if the dislocation is recurrent. The description that best fits this concept is a compression fracture on the anteromedial (often described as anterosuperomedial) part of the humeral head due to a posterior dislocation, with posterior shoulder instability as a potential consequence. The other options describe injuries that don’t match this mechanism or location: a coracoid fracture, a glenoid rim fracture without humeral head involvement, or a posterosuperior humeral head fracture associated with an anterior dislocation.

The key idea is that a reverse Hill-Sachs lesion is an impression (compression) fracture of the anteromedial portion of the humeral head caused by a posterior dislocation of the shoulder. When the humeral head is driven backward, the anteromedial region impacts against the posterior glenoid rim, creating this dent. Clinically, this lesion can contribute to posterior shoulder instability if it engages during movement or if the dislocation is recurrent.

The description that best fits this concept is a compression fracture on the anteromedial (often described as anterosuperomedial) part of the humeral head due to a posterior dislocation, with posterior shoulder instability as a potential consequence. The other options describe injuries that don’t match this mechanism or location: a coracoid fracture, a glenoid rim fracture without humeral head involvement, or a posterosuperior humeral head fracture associated with an anterior dislocation.