title: Yolk sac tumour involving floor of mouth: case report.
abstract: Yolk sac tumour is a rare malignant tumour of germ cell origin that usually arises from the gonads. It is extremely rare in the head and neck. We present a case of a yolk sac tumour that involved the floor of the mouth in a 14-month-old Chinese girl. The diagnosis was confirmed by histological examination that showed characteristic Schiller-Duval bodies, and immunohistochemical examination that showed α-fetoprotein being expressed within the cytoplasm of the neoplastic cells. The patient died 4 months postoperatively. To our knowledge, this is the first case of a yolk sac tumour of the floor of mouth that has been reported in an English journal.
authors.affiliation: Department of Oral & Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanchang University, Nanchang, China. zhq0608@yahoo.cn
authors.forename: Q
authors.initials: Q
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Huang
authors.forename: C Y
authors.initials: CY
authors.lastname: Bao
authors.forename: L J
authors.initials: LJ
authors.lastname: Li
mesh_terms: D018240:Endodermal Sinus Tumor / Q000175:diagnosis*; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D007223:Infant; D008207:Lymphatic Metastasis / Q000175:diagnosis; D009060:Mouth Floor / Q000473:pathology*; D009062:Mouth Neoplasms / Q000175:diagnosis*