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Peripheral Solitary Pulmonary Nodule: CT Findings in Patients with Pulmonary Emphysema¹

¹ From the Department of Radiology, St Marianna University School of Medicine, 2–16-1 Sugao, Miyamae-Ku, Kawasaki City, Kanagawa 216-8511, Japan. Received April 13, 2004; revision requested June 1; revision received July 3; accepted July 17. Address correspondence to S.M. (e-mail: shinma@d9.dion.ne.jp).

View larger version (139K): [in a new window]   Figure 1. Transverse 2-mm-thick CT scan shows benign nodule in 70-year-old man. The nodule, located in the right upper lobe, had spiculation, and the radiologists diagnosed it as malignant. Emphysema surrounded 60% of the nodule.

View larger version (158K): [in a new window]   Figure 2. Transverse 2-mm-thick CT scan shows adenocarcinoma in 64-year-old man. The nodule, located in the right upper lobe, had a well-defined polygonal shape and exhibited no lobulation, spiculation, or air bronchogram; the radiologists classified it as benign. Emphysema surrounded 70% of the nodule.