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Putti Sign

The Putti Sign is observed when the medial edge of the scapula protrudes above the shoulder joint with shoulder adduction and forced external rotation.. It is often seen in the setting of obstetric brachial plexus palsy. It is due to compensatory scapulothoracic motion to adduct the arm, resulting in elevation of the superomedial border of the scapula into the trapezius,…

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Crossover Sign

Crossover Sign of the Hip/Acetabulum The crossover sign is a radiographic finding that is often associated or discussed in the setting of hip impingement, namely femoracetabular impingement (FAI). The crossover sign is indicative of acetabular retroversion, which causes pincer-type FAI. The crossover sign is associated with focal cranial retroversion, and on AP pelvic radiographs is characterized by the anterior rim of the…

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