The More You See, the More Confusion: Two Cases of Pneumonia With Confusing Imaging Findings of Adenocarcinoma.

Imaging studies are a helpful tool when facing pulmonary pathology. While a specific radiologic pattern suggests a diagnosis, a multidisciplinary approach is ideal. Pneumonia and lung adenocarcinoma (LADC) are among the leading causes of morbidity and mortality worldwide. LADC has many patterns on computed tomography (CT); when it manifests as parenchymal consolidation, it is often difficult to distinguish from pneumonia, leading to a delayed or erroneous diagnosis. To achieve a definite diagnosis, clinical information, imaging, and laboratory findings are required. We present two cases that illustrate the importance of applying image interpretation to clinical context. In the first case CT was suspicious for pulmonary malignancy, after a failed response to antibiotics, subsequent invasive interventions led to infection dissemination and complicated clinical course. In the second case, CT showed similar imaging findings to those observed in case one. In case two, however, a conservative approach led to optimal outcomes and improved quality of care.