Branchial cleft cyst

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Type 1 - inferoposteromedial to pinna, angle of mandible to EAC or periparotid.

Type 2 - most common (90%), anterior to mid SCM, deep to ICA, angle of mandible, CCA bifurcation, or parapharengeal

Type 3 - anterior to lower SCM, superficial

Type 4 - low, anterior to SCM, 90% left sided, follows recurrent larengeal nerve