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[A surgical case of liposarcoma in the chest wall within the thoracic cavity of a young patient].

A 21-year-old man presented to our hospital on June 7, 1990, asymptomatic but with an abnormal shadow in his chest roentgenogram. A well-demarcated tumorous shadow was seen in the left hilum of the lung in the frontal view of the chest X-ray, and adjacent to the posterior chest wall in the lateral view. A percutaneous needle biopsy was performed, and since there were no malignant findings, the tumor was left untreated for future examinations. However, since the tumor was observed to be enlarging gradually in subsequent chest X-rays, it was resected surgically on June 18, 1991. The tumor was fist-sized and its surface smooth, and was protruding into the thoracic cavity. At surgery, the tumor was separated from the chest wall. The tumor, weighing 170 grams, was diagnosed pathologically as a liposarcoma (myxoid type). It was confirmed that there was no infiltration into the surrounding tissue and that total resection had been performed. There are few reports of liposarcomas within the thoracic cavity developing in the extra-mediastinal chest wall. As our case is the second in Japan occurring in a young patient, we present it here together with a review of the literature.