CT scan of mastoid and swelling of the neck. Differential diagnosis should include: * Acute upper jugular lymphadenitis *<unk>  or mass in Lower part of parotid * Infected branchial cyst * Parapharyngeal<unk>  * Jugular vein thrombosis
Bezold's abscess
Munro's microabscess
Cold abscess
Butcher's wart
Dercum's disease
Steatocystoma multiplex
Erysipeloid of Rosenbach
Bartholin's cyst