Abstract
Many case reports have been reported in the past. The present case describes a rare finding of unique Musculocutaneous Axillary Arch Muscle (AAM) having cutaneous origin as its unique feature describing it to be atavistic and was seen to compress specially intercostobrachial nerve along with neurovascular bundle in axilla. Cutaneous origin relates back to be leftover of subcutaneous muscle, i. e. panniculus carnosus which may have served protective function in pectoral and axillary region in lower animals. Knowledge of these variations are of great significance, while performing surgical and radiological procedures in axilla and must be investigated before operating, so as to aid full exposure of area and avoid unnecessary complications.