(1) D.Y.PATIL MEDICAL COLLEGE,PIMPRI,PUNE,MAHARASHTRA,INDIA
(2) COLLEGE OF MEDICINE, NEPAL ARMY INSTITUTE OF HEALTH SCIENCES,NEPAL
(3) ANDAMAN AND NICOBAR ISLANDS INSTITUTE OF MEDICAL SCIENCES,PORT BLAIR,INDIA
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Brachial plexus is a network of nerve fibers formed by ventral rami of fifth to eighth cervical nerve and first thoracic nerve. Because of the extensive branching occurring in brachial plexus, variations are very common in this structure.
We report a case of bilateral variations in 68 years old male cadaver. Result-In 68 year male cadaver fifth cervical nerve root, instead of passing between scalenus anterior and medius was piercing the scalenus anterior, before joining the sixth cervical root to form upper trunk. Seventh cervical nerve root was also contributing to medial cord.
Similar anomalies have been reported by various workers in the past.
This type of variation is fairly common and has clinical and surgical significance especially for regional anesthetic blocks, thoracic outlet syndrome, surgeries in this region and interpretation of radiological images.