Abstract
Fibrosarcoma is a rare neoplasm associated with locally-recurring and highly metastatic malignant mesenchymal fibroblast. This type of neoplasm is more prevalent among young adults and children. Fibrosarcoma can be treated by surgery for excision of the healthy marginal tissues alone or in combination with radiotherapy. This study presents the case of a 22-year-old female patient in Arak Vali-e-Asr Hospital, Iran 2018, complaining of hemorrhage and thoracic pain between her two scapula bones. On examination, a hemorrhagic tumor necrosis was observed. Cranial nerve examination showed normal results, no tenderness was detected in cervical and lumbar vertebrae, while thoracic vertebrae were tender. The limb force was 5/5 . CT scan and MRI imaging showed a well-defined soft tissue tumor measuring 140 *126*140 mm3. It did not involve the vertebrae and spinal canals. The patient underwent surgery three days post-admission and a 2600-gram mass was excised. Pathological results indicated a fibrosarcoma (grade of 2-3) with mitosis but no necrosis