ABSTRACT
Introduction: Malignant fibro-histiocytoma (MFH) is considered as a rare cutaneous tumor. The most frequent places affected are extremities (49%) followed by retroperitoneum (16%). Main treatment method is surgery, however, relapse rates are high, about 40% of cases, with local relapses and/or distant metastases.
Objective: Case report of rare pathology.
Method: Case report of soft large tissue tumor (fibro-histiocytoma malignant) (15.5 x 11.5 x 10 cm), treated through surgery.
Results: Lesion was identified as malignant fibro-histiocytoma, pleomorphic histological subtype with present ulceration, and subcutaneous and striatal muscle tissue invasion. Low-differentiated and high-grade tumor.
Discussion: MFH is a rare malignant tumor, derived from whole body mesenchymal tissue. MFHs typically appear as rapidly growing masses in soft tissues of extremities and bones in patients aged 50-70 years. Tumor histogenesis remains controversial. Distant metastases occur in up to 40% of cases, most frequent sites are lung (80-90%), bones and liver. Treatment is essentially surgical and consists in complete tumor resection due to its malignant potential. Adjuvant therapy is of little or no benefit.
Conclusion: Because it is a tumor with pathogenesis and treatment not very well known, and suggesting that best treatment way is surgery, we could verify that the result presented in this case was similar to reports found in literature, although it is a case with short evolution period. Up to two months postoperatively the patient remains without signs of local or distant recurrence or resection due to its malignant potential.
Keywords: Histiocytoma, Malignant Fibrous; Surgery, Plastic; Surgical Flaps; Medical Oncology.