title: [A case of malignant mesenchymoma of the maxilla].
abstract: The case of a 48-year-old male with a malignant mesenchymoma of the maxilla is reported. The patient had complained of bloody rhinorrhea and cheek pain, and a total maxillectomy was performed. The tumor consisted of a rhabdomyosarcoma, an osteosarcoma and a chondrosarcoma, which were relatively differentiated. Later, recurrence of a tumor and a lung metastasis occurred, however the tumor revealed undifferentiated mesenchymal cells. This led us to suspect the origin of the malignant mesenchymoma had been a primitive mesenchymal cell. To our a knowledge, the present case is the first reported case of a malignant mesenchymoma with a maxillary origin in the world.
authors.affiliation: Dept. of Otorhinolaryngology, Univ. of Tokyo.
authors.forename: S
authors.initials: S
authors.lastname: Kikuchi
authors.forename: M
authors.initials: M
authors.lastname: Asai
authors.forename: Y
authors.initials: Y
authors.lastname: Horiuchi
authors.forename: T
authors.initials: T
authors.lastname: Iwasawa
authors.forename: A
authors.initials: A
authors.lastname: Takahashi
authors.forename: R
authors.initials: R
authors.lastname: Aoyama
authors.forename: W
authors.initials: W
authors.lastname: Okita
mesh_terms: D002813:Chondrosarcoma / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D008441:Maxillary Neoplasms / Q000473:pathology* / Q000601:surgery; D008637:Mesenchymoma / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology / Q000601:surgery; D012516:Osteosarcoma / Q000473:pathology / Q000601:surgery; D012208:Rhabdomyosarcoma / Q000473:pathology / Q000601:surgery