Fig. 4From: Os acromiale may be a contraindication of the clavicle hook plate: case reports and literature reviewPreoperative examination of the right shoulder. A Right shoulder AP view: The increase of AC distance. B, C CT of the right shoulder: clear sclerotic margin between the os acromiale and the truncated acromion. D Pre-operation MRI: the interface between the os acromiale and the truncated acromion is likely a type of fibrocartilage. E Pre-operation MRI: discontinuity of the trapezoid ligament. F Pre-operation MRI: swollen and increased signal of conoid ligament. The white arrowhead indicates the os acromialeBack to article page