CS Extension

This input is used for staging

Notes

**Note 1**: AJCC 7th Edition T1 and T2 categories are based on size and high risk features and not depth of invasion or extension. AJCC 7th Edition does not include a T3 category for scrotum. **Note 2**: The assignment of the T1 category for cutaneous squamous cell carcinomas with one or no high-risk features is based on tumor size. A physician's statement of the T1 category may be used to code both CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently; for example, the record may document size but not extension. Use codes 310, 320, and 810 as appropriate to code CS Extension based on a statement of T when no other extension information is available. **Note 3**: Use code 300 (Localized, NOS) when no further information is available to assign code 100, 305, 310, or 320.

Default

999

NAACCR Item

NAACCR #2810

Code	Description	AJCC 7 T	AJCC 6 T	Summary Stage 1977 T	Summary Stage 2000 T
000	In situ, intraepidermal, intraepithelial, noninvasive Bowen disease	Tis	Tis	IS	IS
100	Confined to scrotum	Extension Size High Risk	Extension Size AJCC6	L	L
300	Localized, NOS	Extension Size High Risk	Extension Size AJCC6	L	L
305	Subcutaneous tissue	Extension Size High Risk	Extension Size AJCC6	L	L
310	Stated as T1 with no other information on extension	Extension Size High Risk	Extension Size AJCC6	L	L
320	Stated as T2 with no other information on extension	T2	T2	L	L
400	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 450 and 500 Adjacent connective tissue (See definition of connective tissue in General Rules, Part I)	Extension Size High Risk	Extension Size AJCC6	RE	RE
450	Adjacent connective tissue excluding skeletal muscle	Extension Size High Risk	Extension Size AJCC6	RE	RE
500	Skeletal muscle	Extension Size High Risk	T4	RE	RE
600	Adjacent organs/structures: Male genital organs: Epididymis Penis Prostate Spermatic cord Testis	Extension Size High Risk	T4	RE	RE
650	Underlying cartilage	Extension Size High Risk	T4	D	D
800	Further contiguous extension: Other organs and structures in male pelvis: Bladder Rectum Urethra	Extension Size High Risk	T4	D	D
805	Bone: Axial or appendicular skeleton	T4	T4	D	D
810	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

- For CS Extension codes 100-310 and 400-800 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Tumor Size and CS Site-Specific Factor 12, High Risk Features, as shown in the Extension Size High Risk Table for this schema. - For CS Extension codes 100-310, 400, and 450 ONLY, the T category for AJCC 6 staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size AJCC 6 Table for this schema.