Serendipitous actinomycosis infection mimicking malignant lesion in carcinoma of unknown primary

Abstract

Actinomycosis is a bacterial infection caused by Actinomyces species that are commensal in the human oral cavity, digestive tract, and genital tract. The present case highlights actinomycosis of the hypopharynx, mimicking malignancy in18F-fluorodeoxyglucose positron emission tomography-computed tomography.