Lemierre's syndrome complicated by an infected branchial cyst.

We present a case of a young man with Lemierre's syndrome characterised by suppurative thrombophlebitis of the internal jugular vein and multiple septic embolic lesions with cavitations in both lungs resulting from an infected branchial cyst which was previously undiagnosed. Lemierre's syndrome is a rare presentation, especially with pulmonary cavitations, but remains a serious illness with a high mortality rate. Early recognition and prompt treatment have significant impact on prognosis. We believe this to be the first case of Lemierre's syndrome complicated by a previously undiagnosed, infected branchial cyst.