This case highlights a rare presentation of fibrosarcoma with repeated soft tissue metastases but no lung or bone involvement, allowing for a 9-year survival following repeated surgical resections.
Exclusive soft-tissue metastases in fibrosarcoma may permit prolonged survival with serial resections; leaves open generalizability and metastatic mechanisms.
The patient is a 69-year-old female. A tumor of 5cm in diameter was found under the skin of the left lumbar region at the age of 60, in 1977, and extirpation was performed. The pathological diagnosis was fibrosarcoma, and additional resection of the surrounding tissue was performed the following day. Metastasis was found in the left deltoid muscle when she was 66, in 1982, and extirpation was performed. Metastasis was again found in the left retroperitoneal cavity when she was 68, in 1984, and extirpation was performed. Local recurrence was found in the left retroperitoneal cavity and metastasis was found in the right rectal muscle of the lower abdomen when she was 69, in 1986, and extirpations were performed. Fibrosarcoma, in general, shows local recurrence and hematogenous metastases to the lung, bone, and other areas, and cases that show metastases have a poor prognosis. It is interesting that our case did not show metastases to the lung and bone, but to the soft tissues, as many as three times, and is still alive nine years after onset.
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Suzuka et al. (1987) studied this question.
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