The relationship of the nerves in the axilla to the chest wall muscles is shown. The long thoracic nerve is medial and posterior, lying on the serratus anterior muscle which it supplies. The thoracodorsal nerve lies lateral and anterior, running with the vessels of the same name to the anterior edge of the latissimus muscle. The intercostobrachial cutaneous nerve emerges between the ribs and traverses the axillary fat pad. It usually must be excised with the specimen.
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