title: Extrarenal teratoid Wilms' tumor: two cases in unusual locations, one associated with elevated serum AFP.
abstract: Teratoid Wilms' tumor is an unusual morphological entity characterized by a classic triphasic malignancy with predominantly heterologous tissue. The authors describe two cases of teratoid Wilms' tumor with an extrarenal site: one in a 13-year-old girl with vaginal spotting (patient 1) and another in a 1-day-old girl with a sacrococcygeal mass (patient 2). The tumors were located in the vagina and coccyx, respectively. Under the initial clinical diagnosis of sarcoma botryoides in patient 1 and teratoma in patient 2, the masses were removed. Microscopically, both tumors were composed of typical triphasic Wilms' tumor tissue with primitive cartilage and skeletal muscle, and squamous and columnar mucinous epithelia. The patient with sacrococcygeal mass (patient 2) had an elevated serum AFP level. The patients were given chemotherapy and have now remained disease free for 7 years 1 month, and 2 years 5 months after surgery, respectively. Familiarity with this rare variant of Wilms' tumor might be important in arriving at a correct diagnosis.
authors.affiliation: Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736, Korea.
authors.forename: Joon Seon
authors.initials: JS
authors.lastname: Song
authors.forename: In Koo
authors.initials: IK
authors.lastname: Kim
authors.forename: Yong Man
authors.initials: YM
authors.lastname: Kim
authors.forename: Shin-Kwang
authors.initials: SK
authors.lastname: Khang
authors.forename: Kyu-Rae
authors.initials: KR
authors.lastname: Kim
authors.forename: Yonghee
authors.initials: Y
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000970:Antineoplastic Agents / Q000627:therapeutic use; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003050:Coccyx / Q000473:pathology* / Q000601:surgery; D003520:Cyclophosphamide / Q000627:therapeutic use; D003609:Dactinomycin / Q000627:therapeutic use; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013125:Spinal Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D013724:Teratoma / Q000188:drug therapy / Q000473:pathology / Q000601:surgery; D014625:Vaginal Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D014750:Vincristine / Q000627:therapeutic use; D009396:Wilms Tumor / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000970:Antineoplastic Agents; D000509:alpha-Fetoproteins; D003609:Dactinomycin; D014750:Vincristine; D003520:Cyclophosphamide