RT Book, Section A1 Chan, Yvonne A1 Goddard, John C. SR Print(0) ID 1172371598 T1 TNM Classification in Otolaryngology—Head and Neck Surgery T2 K.J. Lee’s Essential Otolaryngology: Head and Neck Surgery, 12e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781260122237 LK accesssurgery.mhmedical.com/content.aspx?aid=1172371598 RD 2024/10/09 AB The TNM system describes a cancerous tumor’s involvement at the primary site (T), as well as spread to regional lymph nodes (N) and distant metastasis (M).