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[Pulmonary dirofilariasis with cavity formation and spontaneous regression]
T Kuraki1, H Kobayashi, S Shikata
1Third Department of Internal Medicine, National Defense Medical College, Saitama, Japan.
Abstract:
A 70-year-old woman was admitted to our hospital for evaluation of a nodular shadow and an apparent cavity in the right middle lung field. Transbronchial biopsy and percutaneous needle biopsy had failed to result in a diagnosis. Serial chest X-ray films revealed slight regression of the nodule without therapy. Pulmonary dirofilariasis was diagnosed after open-lung biopsy and Ouchterlony's double diffusion test. Cavity formation and spontaneous regression are rare in pulmonary dirofilariasis.