Accessory Bones of the Shoulder

Description

Radiographic (A) and Illustration (B) of Os Acromiale

The types of os acromiale: (A) the space between the os pre-acromiale and the acromion; (B) the space between the os meso-acromiale and the acromion (note there is a communication with the acromioclavicular joint, found in all our patients); and (C) the space between the os meta-acromiale and the acromion

Introduction

• This page covers all of the accessory bones of the shoulder
• Most are rarely and poorly described in the literature

Os Acromiale

• Anatomical variant representing an unfused accessory ossification center of the acromion
• Often an incidental finding, it may become symptomatic

Rarely and Poorly Described

• Os subacromiale
• Os infraglenoidale
• Os supraspinatum
• Os scapulare
• Os coracoideum

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Clinical Significance

• Symptomatic Os Acromiale

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See Also

• Accessory Bones Main
• Radiology Main
• Shoulder Anatomy Main

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