「 Deltoid tubercle of spine of scapula is prominence of the spine of scapula. The spine, at lateral to the root of the spine, curves down and laterally to form lip.[1] This lip is called the deltoid tubercle. Muscles: Middle and inferior fibres of trapezius muscle, and deltoid muscle, attached to the deltoid tubercle.[1][2] The deltoid tubercle marks the beginning of attachment of deltoid muscle.[1]」