RARE-11. PRIMARY INTRACRANIAL LEIOMYOSARCOMA IN A PATIENT WITH NEUROFIBROMATOSIS TYPE 1

Primary intracranial leiomyosarcoma (LMS) is very rare, with only a few reported cases. Only one prior case report of intracranial LMS in a patient with neurofibromatosis type 1 (NF1) was identified. We report a case of primary intracranial LMS in a patient with known history of NF1. Our patient is a 17-years-old female without history of immunocompromise presenting with severe headaches representative of right frontal hemorrhagic tumor found to be primary intracranial LMS. In prior reported cases, most primary intracranial LMS were treated with sarcoma-based chemotherapy and radiation therapy. Our patient underwent multiple resections, as well as focal radiation. Her chemotherapy initially included ifosfamide, carboplatin, and etoposide, but when she failed etoposide twice due to severe allergic reactions, she completed treatment successfully with the combination of ifosfamide and doxorubicin. She continues to be doing well with no evidence of disease at 41 months post-treatment.