Fig. 2. Axial CT images in 21-year-old man diagnosed with acquired immunodeficiency syndrome.He was referred for incidentally detected pulmonary mass during treatment of Pneumocystis jiroveci pneumonia. A. Contrast-enhanced chest CT image shows 4.0-cm mildly enhanced mass in left lower lobe (arrow). B. CT-guided PTNB was performed by using 22-gauge aspiration needle, and pathologic examination showed chronic inflammation (false-negative result). Patient underwent left lower lobectomy, and lesion was confirmed to be malignant lymphoma in pathologic examination. Fig. 2. Axial CT images in 21-year-old man diagnosed with acquired immunodeficiency syndrome.He was referred for incidentally detected pulmonary mass during treatment of Pneumocystis jiroveci pneumonia… Korean J Radiol. 2019 Aug;20(8):1300-1310. https://doi.org/10.3348/kjr.2019.0189