title: Primary actinomycosis of the thyroid mimicking carcinoma.
abstract: Primary actinomycosis of the thyroid was diagnosed in a 59 year old farmer who presented with a hard, non-tender, thyroid nodule. The difficulties encountered in the diagnosis of actinomycetal infections, its pathogenesis, and treatment are discussed.
mesh_terms: D000190:Actinomyces / Q000302:isolation & purification; D000197:Actinomycosis, Cervicofacial / Q000175:diagnosis* / Q000382:microbiology; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D013959:Thyroid Diseases / Q000175:diagnosis* / Q000382:microbiology; D013960:Thyroid Function Tests; D013964:Thyroid Neoplasms / Q000175:diagnosis*