title: Pathology quiz case 2. Anaplastic thyroid carcinoma (ATC) arising in a preexisting tall cell variant of papillary thyroid cancer.
authors.affiliation: University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Genevieve
authors.initials: G
authors.lastname: Williamson
authors.forename: Uma
authors.initials: U
authors.lastname: Rao
authors.forename: Eugene N
authors.initials: EN
authors.lastname: Myers
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Hunt
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002277:Carcinoma / Q000473:pathology* / Q000601:surgery; D002291:Carcinoma, Papillary / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D013964:Thyroid Neoplasms / Q000473:pathology* / Q000601:surgery