[A case of the localized fibrous mesothelioma which size decreased temporarily].

A 46-year-old woman complained of a back pain and was pointed the abnormal shadow on chest X-ray by the physician, so she consulted our hospital in January 1987. After a few weeks, the size of the shadow decreased with no treatment, then we followed up her with roentgenograms. Since '91, its size had increased again. Needle biopsy did not give us the diagnosis, but we performed the operation because we suspected some malignant disease. We resected the tumor with the enough surgical margin. Its size was 4 x 3 x 3 cm, its surface was white and smooth. Its was elastic hard and had the pedicle which jointed the visceral pleura. Histological diagnosis was the localized fibrous mesothelioma.