Stage IVB Hypopharyngeal Squamous Cell Carcinoma AJCC v7

Stage IV includes: IVA: (T4a, N0, M0); (T4a, N1, M0); (T1, N2, M0); (T2, N2, M0); (T3, N2, M0); (T4a, N2, M0); IVB: (T4b, Any N, M0); (Any T, N3, M0); IVC: (Any T, Any N, M1). T4a: Tumor with moderately advanced local disease. Tumor invades the thyroid/cricoid cartilage, hyoid bone, thyroid gland, or central compartment soft tissue. Central compartment soft tissue includes prelaryngeal strap muscles and subcutaneous fat. T1: Tumor limited to one subsite of hypopharynx and/or 2 cm or less in