title: Occult malignancy in neonatal sacrococcygeal teratomas. A report from a Combined Pediatric Oncology Group and Children's Cancer Group study.
abstract: OBJECTIVE
  Six children who had mature or immature sacrococcygeal teratomas diagnosed in the newborn period have since been registered on a Pediatric Oncology Group/Children's Cancer Group germ cell study with recurrent malignant neoplasia [pure yolk sac tumor (YST) or teratoma with yolk sac elements].
  
  
  RESULTS
  Four of the children have responded to therapy, one has died, and one has been lost to follow-up. Review of the slides from five of the original tumors identified microscopic foci of YST in four.
  
  
  CONCLUSIONS
  Detection of such foci in neonatal tumors is important because serum alpha-fetoprotein concentrations may not be helpful since they may normally be high in the newborn period due to fetal production.
authors.affiliation: Department of Pathology, Baylor College of Medicine, Houston, Texas.
authors.forename: E
authors.initials: E
authors.lastname: Hawkins
authors.forename: H
authors.initials: H
authors.lastname: Issacs
authors.forename: B
authors.initials: B
authors.lastname: Cushing
authors.forename: P
authors.initials: P
authors.lastname: Rogers
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D001859:Bone Neoplasms / Q000473:pathology*; D018240:Endodermal Sinus Tumor / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009367:Neoplasm Staging; D010051:Ovarian Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D012008:Recurrence; D013724:Teratoma / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D013736:Testicular Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins