TY - CHAP M1 - Book, Section TI - Carcinoma of Unknown Primary A1 - Spigel, David R. A1 - Greco, F. Anthony A2 - Boyiadzis, Michael M. A2 - Fojo, Tito PY - 2022 T2 - Hematology-Oncology Therapy, 3e AB - EpidemiologyTable Graphic Jump Location|Download (.pdf)|PrintEpidemiologyIncidence:Unknown✫ (Estimated at 30,000–45,000 patients/year)Stage at PresentationMedian age:Varies by histology (usually sixth decade)Local/regional:90%✫Due to patient heterogeneity and tumor registry misclassification American Cancer Society. Cancer Facts & Figures 2013 Greco FA, Hainsworth JD. In: DeVita VT Jr et al, editors. Cancer: Principles & Practice of Oncology, 10th ed. Philadelphia: Wolters Kluwer; 2015:1720–1737Hainsworth JD et al. J Clin Oncol 1991;9:1931–1938Hainsworth JD, Greco FA. N Engl J Med 1993;329:257–263 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - hemonc.mhmedical.com/content.aspx?aid=1187880839 ER -