Atypical Aponeurotic Fused Origin of Pectoralis Minor

Variations of the pectoralis major and minor muscles are common. It is seen that variation in the insertion of pectoralis minor (PMi) is more common. At the origin, documented variation of PMi is not uncommon. Studies have shown that the origin of PMi from the 2 nd to 5 th rib is normal or quite common. The present article is documented on fused atypical and hypertrophied aponeurotic origin of PMi on both sides found during routine dissection of a 65-year-old male cadaver. The variation of PMi is clinically important for surgeons while they perform surgical intervention in avoiding complications, in treating PMi syndrome or thoracic outlet syndrome, as an important neurovascular bundle is covered by PMi. Moreover, PMi acts as an accessory respiratory muscle during forced inspiration.