Hemangiopericytoma following allogeneic hematopoietic stem cell transplantation in a patient with primary plasma cell leukemia: the first case report and literature review - Shi, Yajun; Liang, Guohao; Zhang, Haiying; Wang, Yaqing; Han, Ying; Tong, Shenglian; Liang, Shunyu; Wang, Ying; Bai, Hai (Frontiers in Oncology, 2024)