Second branchial cleft cyst
Painless left neck swelling.
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There is a well-defined cystic lesion in the left side of the neck anterior to the sternocleidomastoid muscle indenting the inferior border of parotid gland, compressing and stretching the internal jugular vein on its lateral and anterior borders. The lesion has a relatively thick enhancing wall and measures about 57×33×28mm in diameters with no signs of invasion into surrounding structures.
Left sided cystic neck lesion related to SCM represents second branchial cleft cyst.