Definition of teratoma in US English:



  • A tumor composed of tissues not normally present at the site (the site being typically in the gonads).

    • ‘However, five of 19 animals developed teratomata; tumour formation being a major complication of embryonic stem cell transplantation.’
    • ‘The treatment for teratomas, whether benign or malignant, is resection as the tumor may grow to impinge on adjacent structures.’
    • ‘Gastric teratoma is a rare tumor usually seen in male infants.’
    • ‘The gastrointestinal tract is an unusual site for teratomas to occur.’
    • ‘To our knowledge, no similar tumor has been described in the ovary or in teratomas at any other site.’