Variations in the origin of inferior belly of omohyoid muscle

ABSTRACT

The attachment of the inferior belly of the omohyoid muscle is highly variable. In 58.57% of cases it arises from the scapular notch, in 20% of cases from scapular notch, superior transverse ligament and clavicle, in 5.71% of cases from clavicle only, in 2.85% of cases from coracoclavicular ligament and in 4.28% of cases it is completely absent. The thick muscular inferior belly of omohyoid attached to the clavicle could cause confusion during operatve procedures such as in lymph node biopsy involving minimal exposure