Combined Escherichia coli and Staphylococcus aureus thyroid abscess in an asymptomatic man.

Patients with acute suppurative thyroiditis usually have pain or tenderness in the anterior part of the neck associated with erythema and dysphagia. An elderly man with none of these symptoms presented with fever and a urinary tract infection. When his systemic infection failed to respond to antibiotics, a search for an occult abscess was undertaken. An 111Indium leukocyte scan indicated a localized abscess in the right lobe of his thyroid from which Escherichia coli and Staphylococcus aureus coagulase positive were isolated. This case demonstrates that a thyroid abscess can occur in a completely asymptomatic patient without a clinically enlarged thyroid.