Gliosarcoma in a patient with triple-negative breast cancer: A case report

Gliosarcoma is a rare subtype of glioblastoma with the histological features of both glioblastoma and soft-tissue sarcoma. Triple-negative breast cancer (TNBC) is a special type of breast cancer that is different from other breast cancers. It is characterized by strong invasiveness, high recurrence rate, and poor prognosis. The concurrent occurrence of gliosarcoma and TNBC was rarely seen and reported. A 63-year-old woman with a history of TNBC was found to have an intracranial mass due to headache. Intracranial tumor resection surgery was undergone, and histopathological examination postoperation revealed gliosarcoma. After craniotomy, the patient underwent standard radiotherapy and chemotherapy. Postoperative follow-up observation showed no obvious recurrence of either tumor. In conclusion, gliosarcoma and TNBC are tumors with poor prognosis. It is rare to encounter two types of malignant tumors in the same patient. When we encounter intracranial space-occupying patients with a history of malignant tumors, we should first consider tumor metastasis. When excluding the possibility of cancer metastasis, the possibility of two primary tumors should be considered.