CS Extension
Notes
**Note 1**: For skin, patch indicates any size skin lesion without significant elevation or induration. **Note 2**: For skin, plaque indicates any size skin lesion that is elevated or indurated. **Note 3**: For skin, tumor indicates at least one 1 centimeter (cm) diameter solid or nodular lesion with evidence of depth and/or vertical growth. If a physician describes a skin lesion of less than 1 cm as a tumor, use code 550. **Note 4**: Use code 150 when skin involvement is present but only a general location/site is mentioned (i.e., face, torso, arms, legs). Use code 300 when there is skin involvement but there is no mention of location/site. **Note 5**: Ignore erythroderma if stated to involve less than 50% of the skin. Use codes 110-150, 210-230, 300, 550, 600. **Note 6**: Physicians use more than one method to estimate percentage of skin involvement by mycosis fungoides (MF). Code percent of skin involvement as stated by the physician. If no percentage is stated and no word such as localized or generalized is used and no stage is given, code as percent not stated. **Note 7**: Use code 950 ONLY if there is no evidence of any type of skin involvement, including plaques, papules, patches, or tumors. Tumor size is coded as 000 in CS Tumor Size only if there is no evidence of any tumor(s) as defined in the CS Tumor Size table note.| Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
|---|---|---|---|---|---|
| 100 | OBSOLETE DATA RETAINED V0200 Plaques, papules, or erythematous patches ("plaque stage"): Less than 10 % of skin surface, no tumors Limited plaques/patches MFCG Stage I |
ERROR: | T1 | L | L |
| 110 | Patches only with less than 10% of skin surface involved | T1a | T1 | L | L |
| 120 | Plaques or papules, with or without patches, with less than 10% of skin surface involved, no tumors | T1b | T1 | L | L |
| 130 | Skin involvement less than 10%, not stated whether plaques, papules or patches, no tumors Limited plaques/patches |
T1NOS | T1 | L | L |
| 150 | Plaques, papules, or erythematous patches: % body surface not stated, no tumors | T1NOS | T1 | L | L |
| 200 | OBSOLETE DATA RETAINED V0200 Plaques, papules, or erythematous patches ("plaque stage"): Greater than or equal to 10% of skin surface, no tumors Generalized plaques/patches MFCG Stage II |
ERROR: | T2 | L | L |
| 210 | Patches only with 10% or more of skin surface involved | T2a | T2 | L | L |
| 220 | Plaques or papules, with or without patches, with 10% or more of skin surface involved, no tumors | T2b | T2 | L | L |
| 230 | Skin involvement 10% or more, not stated whether plaques, papules or patches, no tumors Generalized plaques/patches Stated as T2, NOS |
T2NOS | T2 | L | L |
| 250 | OBSOLETE DATA CONVERTED V0203 See code 150 Plaques, papules, or erythematous patches: % body surface not stated, no tumors |
ERROR: | ERROR: | ERROR: | ERROR: |
| 300 | Skin involvement, NOS: Extent not stated, no tumors Localized, NOS |
T1NOS | T1 | L | L |
| 500 | OBSOLETE DATA RETAINED V0200 One or more tumors (tumor stage) Cutaneous tumors |
ERROR: | T3 | RE | RE |
| 550 | Skin lesion described as tumor less than 1 cm | T2NOS | T3 | RE | RE |
| 600 | One or more tumors equal to 1 cm or greater Cutaneous tumor, size not stated |
T3 | T3 | RE | RE |
| 650 | OBSOLETE DATA CONVERTED V0203 See code 740 Stated as T3 with no other information on extension |
ERROR: | ERROR: | ERROR: | ERROR: |
| 700 | OBSOLETE DATA RETAINED V0200 Generalized erythroderma (greater than 50% of body involved with diffuse redness) Sezary syndrome/Sezary disease MFCG Stage III |
ERROR: | T4 | RE | RE |
| 730 | Generalized erythroderma (Greater than 50% less than 80% body surface involved with diffuse redness) |
T3 | T4 | RE | RE |
| 740 | Stated as T3 with no other information on extension | T3 | T3 | RE | RE |
| 750 | Generalized erythroderma (Equal to or greater than or equal to 80% body surface involved with diffuse redness) |
T4 | T4 | RE | RE |
| 800 | Stated as T4 with no other information on extension | T4 | T4 | RE | RE |
| 950 | No evidence of primary tumor | T0 | T0 | U | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record |
TX | TX | U | U |