Anlotinib for the treatment of recurrent and refractory hemangioblastomas: a case report and review of literature - Tian, Qing; Zhou, Chaofeng; Zhou, Shifan; Wang, Sai; Feng, Baorong; Zhang, Keke; Zhang, Yu; Gao, Jieqiong; Mu, Xiaoyan; Guo, Zhizhong (Frontiers in Oncology, 2025)