_:vb50950417 . _:vb50950417 . _:vb50950417 "A gestational choriocarcinoma that is located_in the placenta."^^ . _:vb50950417 . _:vb50950417 . _:vb50950417 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2577684/"^^ . _:vb50950417 .