Scapula alata refers to the unilateral or bilateral wing-like protrusion of the scapula from the thorax.
Etiology
Scapula alata may result from idiopathic, iatrogenic, or traumatic causes that lead to weakening or paralysis of the Musculus serratus anterior, the rhomboid muscles, or the trapezius muscle. The Nervus thoracicus longus is the most common site of injury leading to paralysis of the serratus anterior muscle and causing medial scapula alata[^1].