title: Multifocal myopericytoma in the maxillofacial region: a case report.
abstract: Myopericytoma is a rare mesenchymal neoplasm with perivascular myoid differentiation. Myopericytoma arises most commonly in middle adulthood. The lesion generally involves the distal extremities; however, tumors can also arise at other sites, including the proximal extremities and head and neck. In this case report, a 43-year-old Chinese woman presented with a painless slowly growing nodule in her right cheek. Biopsy revealed a periluminal proliferation of monomorphic oval to spindle-shaped myoid-appearing cells. Immunohistochemistry showed a positive staining for smooth muscle actin. The clinical, pathologic, and immunohistochemical features are discussed. To our knowledge, this is the first case report in the medical literature of multifocal myopericytoma in the maxillofacial region.
authors.affiliation: Department of Oral Pathology, West China College of Stomatology, Sichuan University, Chengdu, China. chen_yu55@hotmail.com
authors.forename: Lili
authors.initials: L
authors.lastname: Xia
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Ning
authors.initials: N
authors.lastname: Geng
authors.forename: Jinyan
authors.initials: J
authors.lastname: Jiang
authors.forename: Mingzhong
authors.initials: M
authors.lastname: Yang
authors.forename: Weiping
authors.initials: W
authors.lastname: Zhang
mesh_terms: D000199:Actins / Q000032:analysis; D000328:Adult; D005260:Female; D006258:Head and Neck Neoplasms / Q000473:pathology* / Q000601:surgery; D006393:Hemangiopericytoma / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D010307:Parotid Neoplasms / Q000473:pathology* / Q000601:surgery
chemical_list: D000199:Actins