Cardiothoracic Imaging: Case ReportComputed Tomography Findings of Caplan SyndromeArakawa, Hiroaki MD; Honma, Koichi MD; Shida, Hisao MD; Saito, Yoshiaki MD; Morikubo, Hiroshi MDAuthor Information From the Departments of Radiology (Dr Arakawa) and Pathology (Dr Honma), Dokkyo University School of Medicine, Tochigi, Japan; and the Departments of Radiology (Drs Shida and Morikubo) and Respiratory Medicine (Dr Saito), Keihai Rosai Hospital, Tochigi, Japan. Reprints: Hiroaki Arakawa, MD, Department of Radiology, Dokkyo University School of Medicine, 880 Kita-Kobayashi, Mibu, Tochigi 321-0293, Japan (e-mail: [email protected]). Journal of Computer Assisted Tomography: September 2003 - Volume 27 - Issue 5 - p 758-760 Buy Abstract We report a case of Caplan syndrome complicated with tuberculosis, which was clinically followed up for 18 years and underwent autopsy. Initial chest radiograph showed 2 large nodules against the background of smaller pneumoconiotic nodules. One of the large nodules showed cavitation during follow-up. Computed tomography (CT) was helpful in identifying calcification in another large nodule. Autopsy confirmed the 2 large nodules as burned-out rheumatoid nodules and revealed additional rheumatoid nodules that were indistinguishable from silicotic nodules by CT. © 2003 Lippincott Williams & Wilkins, Inc.