US dynamic subacromial impingement with fluid

Ultrasound (US) image of a dynamic subacromial impingement test. Fluid can be seen being milked from under the acromion into the subacromial-subdeltoid bursa during shoulder abduction.

A: acromion; D: deltoid muscle; Asterisk: fluid within the subacromial-subdeltoid bursa; SS: supraspinatus; MED: medial; GT: greater tuberosity of the humerus bone.
Left: medial; Right: lateral; Bottom of screen: deep; Top of screen: superficial.

Graphic 99345 Version 2.0