Mucin-producing tumor of the lung: CT findings.

Primary lung tumors and pulmonary metastases with a large mucin content are relatively rare, and reports of CT findings are scarce. We present the CT images of patients with mucinous bronchioloalveolar carcinoma and lung metastasis of mucinous adenocarcinoma of the colon. The CT findings include a uniform low attenuation (4.5 and 7.8 HU), irregular margins, and slight enhancement after intravenous injection of contrast medium.