]> C30.1 Middle ear Note 1: Laterality must be coded for this site. Note 2: AJCC does not define TNM staging for this site. &generalsize; CS Extension Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 In situ, intraepithelial, noninvasive NA NA IS IS 100 NA NA L L 300 Localized, NOS NA NA L L 400 NA NA RE RE 600 NA NA RE RE 700 NA NA RE RE 800 NA NA D D 950 No evidence of primary tumor NA NA U U 999 NA NA U U ¬appcsextevalnontnm; CS Lymph Nodes Note 1: For head and neck schemas, this field includes all lymph nodes defined as Levels I-VII and Other by AJCC. The complete definitions are provided in the General Rules, Section 2. Note 2: For head and neck schemas, additional information about lymph nodes (size of involved nodes, extracapsular extension, levels involved, and location of involved nodes above or below the lower border of the cricoid cartilage)is coded in CS Site-Specific Factors 1,3-9. Note 3: If laterality of lymph nodes is not specified, assume nodes are ipsilateral. Midline nodes are considered ipsilateral. Note 4: For head and neck cancers, if lymph nodes are described only as "supraclavicular", try to determine if they are in Level IV (deep to the sternocleidomastoid muscle, in the lower jugular chain) or Level V (in the posterior triangle, inferior to the transverse cervical artery) and code appropriately. If the specific level cannot be determined, consider them as Level V nodes. Note 5: The description of lymph nodes has been standardized across the head and neck schemas. All lymph node levels and groups listed here are considered regional nodes for AJCC staging. Summary Stage 1977 and Summary Stage 2000 divide these nodes into regional and distant groups. Note 6: Mandibular nodes are included with Facial nodes. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 No regional lymph node involvement NA NA NONE NONE 100 NA NA RN RN 120 NA NA D D 800 Lymph nodes, NOS NA NA RN RN 999 NA NA U U ¬appcsregnodesevalnontnm; &generalreglnpos; &generalreglnexam; &commonmetsatdxpharynxother; ¬appcsmetsevalnontnm; &commonssf1melanomaheadandneck; &commonssf2headneck; &commonssf3headneck; &commonssf4headneck; &commonssf5headneck; &commonssf6headneck; &commonssf7headandneck; &commonssf8headandneck; &commonssf9headandneck; &commonssf10headandneck; ¬appnewssf11; ¬appnewssf12; ¬appnewssf13; ¬appnewssf14; ¬appnewssf15; ¬appnewssf16; ¬appnewssf17; ¬appnewssf18; ¬appnewssf19; ¬appnewssf20; ¬appnewssf21; ¬appnewssf22; ¬appnewssf23; ¬appnewssf24; ¬appnewssf25; ¬apphistologiestnm7; &commonhistologyexclusions1; ¬appcsstagetnm7; ¬appcsstage; &commonsummarystage;