Partial Aplasia of the Pectoralis Major Muscle with an Anomalous Distal Insertion: Two Case Reports

Denti, Matteo; Facchini, R.; Peretti, G.

doi:10.1097/01241398-198507000-00022

Cited by 3 publications

(2 citation statements)

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“…Both ipsilateral and contralateral deficiency (aplasia) of pectoralis major has been reported by investigators (Denti et al ., 1985; Mosconi & Kamath, 2003). The absence of pectoralis major as well as pectoralis minor is rare (Jones, 1926).…”

Section: Discussionmentioning

confidence: 82%

“…Its fibers traverse upwards and laterally to form a flat tendon that inserts onto the coracoid process of the scapula (William, 2000). Pectoral muscles develop from a primitive muscle mass constituting the upper limb, derived from the fifth to the seventh cervical myotomes, during the fifth week of intra‐uterine life (Denti et al ., 1985; Turgut et al ., 2000).…”

Section: Discussionmentioning

confidence: 99%

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Anomalous pectoral musculature

Soni

Rath

Suri

et al. 2008

Anatomical Science International

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Anomalous disposition of pectoral muscles was encountered in an adult female cadaver on the left side. A prominent cleft separating the sternocostal and clavicular portions of the pectoralis major was noticed. The fibers of pectoralis major were partially fused with the deltoid, resulting in obliteration of the deltopectoral groove. Interestingly, cephalic vein was seen traversing superficial to the clavicular portion of the pectoralis major and pierced it to drain into the axillary vein. The pectoralis minor was inserted mainly on the coracoid process and few fibers were found blending with the coracobrachialis and short head of biceps brachii. Further, pectoralis minimus, a rare anatomic variant, was also observed lying superior to pectoralis minor. It was innervated by a twig from the lateral pectoral nerve at its superficial surface. Awareness of possibility of such anomalous muscles is important for surgeons operating on the chest wall.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%