Absence of Posterior Triangle: Clinical and Embryological PerspectiveCorrespondence Address :
Dr. Puja Chauhan,
Department of Anatomy, Vardhman Mahavir Medical College and Safdarjung Hospital,
New Delhi -110029, India.
Sternocleidomastoid (SCM) and Trapezius (TM) muscle present in the cervical region serves as an important landmark in forming boundaries of posterior triangle of neck. This case reports a continuous muscle sheet obscuring the left posterior triangle in the neck of a 60-year-old Indian male cadaver. An unfamiliar oval gap was observed in its posterosuperior portion. Description of such a variant in anatomical literature is rare and is scarcely reported. An attempt has been made to portray its embryological and phylogenetic basis. In addition authors have endeavoured to discuss its clinical implications. Awareness of such anatomical variations is relevant for the operating surgeons in their endeavour to perform various reconstruction surgeries of head and neck, radiologists while concluding various levels in Computed Tomography (CT) and Magnetic Resonance Images (MRI) of the region and to the anaesthetists in their search for nerves and vessels while attempting various anaesthetic procedures.
Fusion, Partial degeneration, Sternocleidomastoid, Trapezius
Shikha Singh, Puja Chauhan, Hitendra Kumar Loh, Vandana Mehta, Rajesh Kumar Suri. ABSENCE OF POSTERIOR TRIANGLE: CLINICAL AND EMBRYOLOGICAL PERSPECTIVE. Journal of Clinical and Diagnostic Research [serial online] 2017 February [cited: 2017 Apr 30 ]; 11:AD01-AD02. Available from
Date of Submission: Sep 03, 2016
Date of Peer Review: Oct 07, 2016
Date of Acceptance: Oct 14, 2016
Date of Publishing: Feb 01, 2017
Financial OR OTHER COMPETING INTERESTS: None.
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