Pulmonary actinomycosis is a rare yet important and
challenging diagnosis to make. It is commonly confused
with other lung diseases, such as tuberculosis and
bronchogenic carcinoma, leading to delay diagnosis or
misdiagnosis. A 49-year-old man presented with a chronic
cough, hemoptysis, and pleuritic chest pain. His initial
imaging studies including computed tomography (CT) was
suggestive of bronchogenic carcinoma. A subsequent CTguided
biopsy was consistent with pulmonary
actinomycosis and excluded the possibility of bronchogenic
carcinoma. He was treated with antibiotic therapy and
achieved remission with complete radiological resolution
upon follow-up.