Images from treatment plans illustrating differences in radiation treatment for a patient with (A) an identified HPV-positive base-of-tongue primary tumor, (B) an HPV-positive metastasis without identified primary, and (C) an HPV-negative metastasis without identified primary. © 2019 The American Laryngological, Rhinological and Otological Society, Inc.

Images from treatment plans illustrating differences in radiation treatment for a patient with (A) an identified HPV-positive base-of-tongue primary tumor, (B) an HPV-positive metastasis without identified primary, and (C) an HPV-negative metastasis without identified primary. © 2019 The American Laryngological, Rhinological and Otological Society, Inc.

Images from treatment plans illustrating differences in radiation treatment for a patient with (A) an identified HPV-positive base-of-tongue primary tumor, (B) an HPV-positive metastasis without identified primary, and (C) an HPV-negative metastasis without identified primary.

© 2019 The American Laryngological, Rhinological and Otological Society, Inc.

ENTtoday - https://www.enttoday.org/article/stepwise-diagnosis-helps-identify-primary-tumors-in-majority-of-patients/ent_0719_pg10b/