CS Extension

This input is used for staging

Notes

**Note 1**: In the case of multiple simultaneous tumors, code the tumor with the greatest extension. **Note 2**: Skin ulceration does not alter the AJCC T category. **Note 3**: In-transit metastasis is coded in CS Lymph Nodes. **Note 4**: The assignment of the T1, T2, and T3 categories for Merkel cell carcinomas is based on tumor size. A physician's statement of the T 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, 330, and 810 as appropriate to code CS Extension based on a statement of T when no other extension information is available.

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	Tis	Tis	IS	IS
100	Lesion(s) confined to dermis Confined to scrotum	Extension Size AJCC7	Extension Size AJCC6	L	L
300	Localized, NOS	Extension Size AJCC7	Extension Size AJCC6	L	L
305	Subcutaneous tissue (through entire dermis)	Extension Size AJCC7	Extension Size AJCC6	L	L
310	Stated as T1 with no other information on extension	Extension Size AJCC7	Extension Size AJCC6	L	L
320	Stated as T2 with no other information on extension	Extension Size AJCC7	Extension Size AJCC6	L	L
330	Stated as T3 with no other information on extension	Extension Size AJCC7	Extension Size AJCC6	L	L
400	Adjacent connective tissue EXCLUDING deep fascia (See definition of connective tissue in general instructions)	Extension Size AJCC7	Extension Size AJCC6	RE	RE
500	Deep fascia, skeletal muscle	T4	T4	RE	RE
600	Adjacent organs/structures Male genital organs: Epididymis Penis Prostate Spermatic cord Testis	T4	T4	RE	RE
610	600 + 500	T4	T4	RE	RE
700	Underlying cartilage, bone	T4	T4	D	D
800	Further contiguous extension Other organs and structures in male pelvis: Bladder Rectum Urethra	T4	T4	D	D
805	OBSOLETE DATA REVIEWED V0203 See codes 500, 610, 700, 808 Underlying cartilage, bone, fascia, skeletal muscle	T4	T4	D	D
808	800 + (500, 700)	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 100-400 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Tumor Size and CS Extension as shown in the Extension Size Table for this schema. - For CS Extension codes 100- 400 ONLY, the T category for AJCC 6 staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this schema.