The Aspergillus species are ubiquitous environmental molds. Invasive pulmonary aspergillosis (IPA) is the most common manifestation of aspergillus infection in immunosuppressed patients. Prolonged neutropenia, use of high-dose steroids, poorly controlled diabetic status, HIV infection, and burns are risk factors for IPA. We report a case of invasive aspergillosis in an immunocompetent host, which was masking the underlying malignancy.A 76-year-old male presented with complaints of cough of six months duration. He was on treatment with multiple courses of antibiotics for the same complaint, but his symptoms did not resolve. The patient's history was significant for 300 pack-years of smoking and diabetes with well-controlled sugar. The physical examination revealed signs of a mass in the left lower lobe. His hemogram and biochemical parameters were within normal limits. His chest radiographs revealed a persistent non-homogenous opacity on the left lower zone, which did not silhouette the cardiac shadow [Figure 1]. His chest CT scan showed a mass in the left lower lobe, posterior segment, with a few subcarinal lymph nodes [Figure 2]. A provisional diagnosis of carcinoma lung was made.
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