]> C31.1 Ethmoid sinus &generalsize; CS Extension Note 1: Involvement of or extension to bone includes any type of tumor extension to the bone, such as erosion, invasion, extension, penetration, or destruction. Note 2: Extension to structures in codes 400 and higher may be from one or both ethmoid sinuses. Note 3: In code 700, "minimal extension to anterior cranial fossa" implies tumor pushing through cribriform plate, but without invasion of the dura or brain. Note 4: Code Base of skull NOS only if no information available to code to more specific bony structures in skull. Note 5: Use code 300 for localized tumor only if no information is available to assign codes 100, 120, 160, or 315. Note 6: Use code 315 410, 680, 725, 810, or 815 if the physician's assignment of T category is the only information available about the extent of the tumor. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 In situ, intraepithelial, noninvasive Tis Tis IS IS 120 T1 T1 L L 140 ERROR ERROR ERROR ERROR 160 T1 T1 L L 220 T1 T1 L L 240 ERROR ERROR ERROR ERROR 260 T1 T1 L L 300 Localized, NOS T1 T1 L L 315 Stated as T1 with no other information on extension T1 T1 L L 320 T2 T2 RE RE 340 T2 T2 RE RE 400 T2 T2 RE RE 410 Stated as T2 with no other information on extension T2 T2 RE RE 620 Base of skull, NOS T3 T3 RE RE 630 Cribriform plate T3 T3 RE RE 640 T3 T3 RE RE 650 Maxillary sinus T3 T3 RE RE 660 Hard palate T3 T3 D D 680 T3 T3 RE RE 700 T4a T4a RE RE 720 T4a T4a D D 725 Stated as T4a with no other information on extension T4a T4a RE RE 760 T4b T4b RE RE 780 T4b T4b D D 800 Further contiguous extension T4b T4b D D 810 T4b T4b D D 815 T4NOS T4NOS RE RE 950 No evidence of primary tumor T0 T0 U U 999 TX TX U U &generalcstsexteval; 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, Part II. 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: Level III and Level IV nodes have been moved from code 100 in CS Version 1 to code 120, Retropharyngeal nodes have been moved from code120 to code 100. Mandibular nodes are included with Facial nodes. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 N0 N0 NONE NONE 100 ^ * RN RN 120 ^ * D D 180 Stated as N1 with no other information on regional lymph nodes ^ * RN RN 190 Stated as N2a with no other information on regional lymph nodes ^ * RN RN 200 Multiple positive ipsilateral nodes listed in code 100 ^ * RN RN 220 ^ * D D 290 Stated as N2b with no other information on regional lymph nodes ^ * RN RN 300 ^ * RN RN 320 ^ * D D 400 ^ * RN RN 420 ^ * D D 490 Stated as N2c with no other information on regional lymph nodes ^ * RN RN 500 ^ * RN RN 520 ^ * D D 600 Stated as N2 [NOS] with no other information on regional lymph nodes ^ * RN RN 700 Stated as N3 with no other information on regional lymph nodes ^ * RN RN 800 Lymph nodes, NOS N1 N1 RN RN 999 NX NX U U ^ For CS Lymph Nodes codes 100-700 ONLY, the N category for AJCC 7 staging is assigned based on the value of CS Site-Specific Factor 1, Size of Lymph Nodes, using the Lymph Nodes Size Table for this schema. * For CS Lymph Nodes codes 100-700 ONLY, the N category for AJCC 6 staging is assigned based on the value of CS Site-Specific Factor 1, Size of Lymph Nodes, using the Lymph Nodes Size Table for this schema. &generalregnodeseval; &generalreglnpos; &generalreglnexam; &commonmetslips; &generalmetseval; &commonssf1headneck; &commonssf2headneck; &commonssf3headneck; &commonssf4headneck; &commonssf5headneck; &commonssf6headneck; &commonssf7headandneck; &commonssf8headandneck; &commonssf9headandneck; &commonssf10headandneck; &commonssf11headandneck; ¬appnewssf12; ¬appnewssf13; ¬appnewssf14; ¬appnewssf15; ¬appnewssf16; ¬appnewssf17; ¬appnewssf18; ¬appnewssf19; ¬appnewssf20; ¬appnewssf21; ¬appnewssf22; ¬appnewssf23; ¬appnewssf24; ¬appnewssf25; &commonhistinclusioncarcinoma; &commonhistologyexclusions1; &commonstageheadandnecktnm7; &commonheadandneckajcc6; &commonsummarystage; &commonnoderangeanttongue;