Abstract
Extraskeletal mesenchymal chondrosarcoma (EMCS) shows undifferentiated mesenchymal cells and cartilage tissue histologically. A case of radiosensitive EMCS of a 71-year-old woman is reported. In July, 1996, she noticed a tumor in her neck. She was admitted to a local hospital and surgical excision was performed under a diagnosis of malignant tumor of the neck on July 15. histological examination of the resected specimen revealed EMCS. However, had a local recurrence one month after the operation. the tumor grew rapidly. She was referred to our hospital. There was a large, elastic hard tumor on the left side of the neck. Ct and MRI showed that the tumor invaded surrounding tissue such as the left carotid artery, jugular vein and trachea. We judged that radical operation could not be achieved. Thus, she underwent radiation therapy (total 64Gy) which was very effective, and the tumor diminished in size remarkably. On November 19, the second operation was performed. The tumor was completely resected with the jugular vein and the right lobe of the thyroid grand. The pathological specimen showed cartilage tissue without undifferentiated mesenchymal cells. She remains well 4 months after this surgery.
