Objective: To describe computed tomographic (CT) findings of anthracofibrosis involving lung parenchyma.
Methods: Retrospectively reviewed CT findings of 34 patients with anthracofibrosis involving lung parenchyma, showing deposition of anthracotic pigmentation with focal fibrotic lesions on histologic examination.
Results: Types included nodules (41.2%), masses (55.9%), and fibrotic consolidation (2.9%). The mean size was 26.8 mm. The most common location was right upper lobe (n = 10). Satellite nodules were identified in 5 patients, calcification was identified in 11 patients, necrotic low attenuation was identified in 9 patients, and marginal spicule was identified in 26 patients (76.5%). The CT images showed airway manifestation of anthracofibrosis in 13 patients, nodal manifestation in 11 patients, and inactive tuberculosis in 14 patients. Initial radiologic diagnosis included tuberculosis (n = 10), lung cancer (n = 9), organized pneumonia (n = 7), nonspecific pulmonary nodule (n = 7), and anthracofibrosis (n = 1).
Conclusion: Anthracofibrosis involving lung parenchyma appears as a nodule, mass, or fibrotic consolidation, surrounded by long spicule. It may be the spectrum of bronchial anthracofibrosis involving small airway of lung parenchyma.
From the *Department of Radiology and Research Institute of Radiology, †Department of Pulmonary and Critical Care Medicine, and ‡Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
Received for publication May 2, 2012; accepted June 15, 2012.
Reprints: Mi Young Kim, MD, Department of Radiology and Research Institute of Radiology, Asan Medical Center, College of Medicine, University of Ulsan, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul 138-736, Korea (e-mail: firstname.lastname@example.org).
The authors declare no conflict of interest.