coexisting actinomycosis with tuberculosis mimicking as lung mass

Pulmonary mass lesions are very commonly encountered in our practice. sometimes they present as homogenous opacity on a chest xray or ct scan and sometimes as a collapsed lung. most of them are malignant and some are benign also. lung infections rarely present as endobronchial mass. only histopathology can aid us in diagnosing. one rare disease that can present as an invasive mass lesion is pulmonary actinomycosis. we present a case of lung actinomycosis coinfected with mycobacterium tuberculosis that presented to us with the complaint of right lung collapse and effusion due to endobronchial growth mimicking lung malignancy.