摘要：

The solitary fibrous tumor (SFT) is a rare ubiquitous mesenchymal neoplasm of fibroblastic type, which shows a prominent hemangiopericytoma-like branching vascular pattern. Approximately 40% of solitary fibrous tumors are found in subcutaneous tissue, while others are observed in deep soft tissue of extremities or in the head and neck region, thoracic wall, mediastinum, retroperitoneum and abdominal cavity. Extremely rare the SFT arise as a primary bone lesion. We have reported the first case described in literature of the primary sacrum malignant SFT in a 6-year-old child.

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