4Moriya S, Tei K, Notani K, et al. Malignant hemangiopericytoma of the head and neck: a report of 3 cases[J ]. J Oral Maxillofac Surg,2001,59(3):340 - 345.
5Kanazawa T, Nishino H, Miyata M, el al. Haemangiopericytoma of infratemporal fossa[ J ]. J Laryngol Otol, 2001,115 ( 1 ) : 77 - 79.
6Philippou S,Gellrich NC. Hernangiopericytoma of the head and neck region[J]. Int J Oral Maxillofac Surg, 1991,46:421.