case_images: PMC9699834_01
case_images: Coronal and axial planes of brain magnetic resonance reveal hypodense left frontal lesion tumor, suggestive of brain metastasis.
case_images: SNI-13-537-g001.jpg
case_images: PMC9699834_01_SNI-13-537-g001.jpg
case_images: F1
case_images: He was prescribed dexamethasone and contrast-enhanced magnetic resonance imaging was performed, which revealed a left frontal tumor suggestive of brain metastasis [Figure 1].
case_images: Axial plane of postoperative computed tomography scan.
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case_images: PMC9699834_01_SNI-13-537-g002.jpg
case_images: F2
case_images: A postoperative CT scan showed a hematoma at the surgical site, and reoperation was performed to drain the hematoma [Figure 2].
case_images: Histopathology images HE stain shows spindle and pleomorphic cells, which are observed in myxofibrosarcoma tumors. Immunohistochemical marker SATB2, which is sensitive and specific for bone and soft-tissue tumors, was positive.
case_images: SNI-13-537-g003.jpg
case_images: PMC9699834_01_SNI-13-537-g003.jpg
case_images: F3
case_images: Brain tumor histopathology confirmed a malignant neoplasm with osteosarcomatous differentiation and metastasis from MFS [Figure 3].