The Japanese journal of thoracic diseases
Online ISSN : 1883-471X
Print ISSN : 0301-1542
ISSN-L : 0301-1542
A Case of Enlarging Rounded Atelectasis Difficult to Distinguish from a Pulmonary Neoplasm
Kazuhiko NishizakiKiyoshi Ohno
Author information

1996 Volume 34 Issue 12 Pages 1416-1419


A 55-year-old man with occupational exposure to asbestos presented with a chest roentgenographic abnormality that was found during a physical check-up. Computed tomography disclosed pleural thickening and a pulmonary mass in the left lower lobe. A fine-needle biopsy was done, but the presence of a malignant lesion was not confirmed. The patient was asymptomatic. He was observed closely, and 10 months later computed tomography showed that the mass had enlarged. A fine-needle biopsy was done again, but no evidence of malignancy was found. We suspected that it was rounded atelectasis, but could not rule out a neoplasm. An exploratory thoracotomy was done, and the histopathological findings showed that the mass was lung tissue with alveolar wall fibrosis that had resulted in thickening of the wall. The mass was diagnosed as rounded atelectasis. Rounded atelectasis requires no special trestment, but if the mass increases in size as in the case of this patient, an exploratory thoracotomy is required.

Information related to the author
© by The Japanese Respiratory Society
Previous article Next article