Primary Intracranial Mesenchymal Chondrosarcoma: A Case Report

Abstract

Mesenchymal chondrosarcoma is a rare malignancy characterized by a biphasic pattern of small undifferentiated round cells intermixed with island of well-differentiated cartilaginous matrix. Although this type of tumor exhibits widespread distribution in the body, intracranial mesenchymal chondrosarcoma is rare. Radical excision of intracranial mesenchymal chondrosarcoma is important for obtaining a positive prognosis but the effectiveness of chemotherapy and radiotherapy remains uncertain. An 18-year-old patient presented with generalized seizure with magnetic resonance imaging showing a large dura-attached solid mass in the frontal convexity, which was presumptively diagnosed as a meningioma. Gross total resection of tumor was achieved without postoperative deficit. The final histological diagnosis was extra-skeletal mesenchymal chondrosarcoma, grade I. There was no adjuvant treatment after surgery. Five years after surgery, the prognosis was good after gross total resection only; however, long-term follow-up is necessary in the future.