Intracranial ependymoma with extremely rare extraneural metastasis.

Intracranial ependymoma with extremely rare extraneural metastasis.

Ependymomas account for 1-8% of overall brain tumors. They are most common at the age of 3-4 years. Their metastasis is very rare, and extraneural metastasis is even more unusual. In this report, the ependymoma localized in the posterior fossa with metastasis into femoral diaphysis in a 27-year-old male patient, who was treated in 2001, is presented. As we did not have any other cases of patients having a brain and spinal tumor with extraneural metastases even after 21 years, until 2022, this case was found worthy of being presented. When the literature was examined, it was observed that there is still no standard treatment after surgery for ependymomas and their metastasis. Due to their rarity, the general treatment of extraneural metastasis of ependymomas is also under discussion. It is recommended that clinicians consider admitting patients with rare or hard-to-treat tumors to ongoing clinical trials.