Adapted with permission from: Greco FA, Hainsworth JD. Cancer of Unknown Primary Site. In: DeVita, Hellman, and Rosenberg's Cancer: Principles and Practice of Oncology, 9th Edition, DeVita VT, Lawrence TS, Rosenberg SA, et al (Eds), Lippincott Williams & Wilkins, Philadelphia 2011. Copyright © 2011 Lippincott Williams & Wilkins.
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