Collaborative Stage

Note 1: AJCC does not recognize in situ melanoma of the choroid. Any case so coded will be mapped to unknown AJCC stage and in situ Summary Stage.
Note 2: The AJCC 7th Edition assigns a T value to combinations of measurements for basal diameter and thickness of tumor divided into four Tumor Size Categories in a charted format. The AJCC 6th Edition assigned T values based on three pairs of measurements for basal diameter and thickness, using the basal diameter for classification when the two measurements did not fit into the defined pairs.
Note 3: Use codes 150 through 180 if measurements are available to record the largest tumor basal diameter and tumor thickness. ONLY use codes 235 through 445 if measurements are not available for coding. Note that code 635, mapped to T4e, is not based on a Tumor Size Category assignment.
Note 4: ONLY use codes 245, 295, 345, and 445 if the tumor size category is the ONLY information available about the tumor.
Note 5: According to the AJCC, "In clinical practice the largest tumor basal diameter may be estimated in optic disc diameters (dd) (average: 1 dd = 1.5mm). Tumor thickness may be estimated in diopters (average: 2.5 diopters = 1 mm). However, techniques, such as ultrasonography and fundus photography are used to provide more accurate measurements."

^ For Extension codes 150 through 180, the T value is assigned based on the values of tumor basal diameter, recorded in SSF2, and thickness, recorded in SSF3, for AJCC 7th Edition staging. Basal diameter and thickness are mapped to Tumor Size Categories in the Tumor Size Category Table AJCC7, and the Extension codes and Tumor Size Categories are mapped to T values in the Extension Size Category table AJCC7.
* For Extension codes 150 through 180, 635, and 640, the T value is assigned based on the values of tumor basal diameter, recorded in SSF2, and thickness, recorded in SSF3, for AJCC 6th Edition staging. Basal diameter and thickness are mapped to tumor size pairs in the Tumor Size Pair Table AJCC6, and the CS Extension codes and tumor size pairs are mapped to T values in the Extension Size Pair Table AJCC6.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ Noninvasive Intraepithelial	TX	TX	IS	IS
150	Tumor WITHOUT ciliary body involvement WITHOUT extraocular extension (or ciliary body involvement and extraocular extension not stated)	^	*	L	L
160	Tumor WITH ciliary body involvement WITHOUT extraocular extension (or extraocular extension not stated)	^	*	L	L
170	Tumor WITHOUT ciliary body involvement (or ciliary involvement not stated) WITH extraocular extension less than or equal to 5mm in diameter	^	*	RE	RE
180	Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5mm in diameter	^	*	RE	RE
205	Tumor WITHOUTciliary body involvement WITHOUT extraocular extension (or ciliary body involvement and extraocular extension not stated) AND stated as Tumor Size Category 1 Stated as T1a with no other information on extension	T1a	T1a	L	L
215	Tumor WITH ciliary body involvement WITHOUT extraocular extension (or extraocular extension not stated) AND stated as Tumor Size Category 1 Stated as T1b with no other information on extension	T1b	T1a	L	L
220	OBSOLETE DATA RETAINED V0200 Tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness), AND extraocular invasion unknown	ERROR	T1NOS	L	L
225	Tumor WITHOUT ciliary body involvement (or ciliary involvment not stated) WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 1 Stated as T1c with no other information on extension	T1c	T1b	RE	RE
235	Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 1 Stated as T1d with no other information on extension	T1d	T1b	RE	RE
240	OBSOLETE DATA RETAINED V0200 Tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness), WITHOUT microscopic extraocular extension	ERROR	T1a	L	L
245	Tumor Size Category 1 NOS Stated as T1NOS with no other information on extension	T1NOS	T1NOS	L	L
255	Tumor WITHOUT ciliary body involvement WITHOUT extraocular extension (or ciliary body involvement and extraocular extension not stated) AND stated as Tumor Size Category 2 Stated as T2a with no other information on extension	T2a	T2a	L	L
260	OBSOLETE DATA RETAINED V0200 Tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness), WITH microscopic extraocular extension	ERROR	T1b	L	L
265	Tumor WITH ciliary body involvement WITHOUT extraocular extension (or extraocular extension not stated) AND stated as Tumor Size Category 2 Stated as T2b with no other information on extension	T2b	T2a	L	L
275	Tumor WITHOUT ciliary body involvement (or ciliary involvement not stated) WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 2 Stated as T2c with no other information on extension	T2c	T2b	RE	RE
280	OBSOLETE DATA RETAINED V0200 Tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness), WITH macroscopic extraocular extension	ERROR	T1c	L	L
285	Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 2 Stated as T2d with no other information on extension	T2d	T2b	RE	RE
295	Tumor Size Category 2 NOS Stated as T2NOS with no other information on extension	T2NOS	T2NOS	L	L
300	Localized, NOS	T1NOS	T1NOS	L	L
305	Tumor WITHOUT ciliary body involvement WITHOUT extraocular extension (or ciliary body involvement and extraocular extension not stated) AND stated as Tumor Size Category 3 Stated as T3a with no other information on extension	T3a	T3	L	L
315	Tumor WITH ciliary body involvement WITHOUT extraocular extension (or extraocular extension not stated) AND stated as Tumor Size Category 3 Stated as T3b with no other information on extension	T3b	T3	L	L
325	Tumor WITHOUT ciliary body involvement (or ciliary involvement not stated) WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 3 Stated as T3c with no other information on extension	T3c	T4	RE	RE
335	Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 3 Stated as T3d with no other information on extension	T3d	T4	RE	RE
345	Tumor Size Category 3 NOS Stated as T3NOS with no other information on extension	T3NOS	T3	L	L
405	Tumor WITHOUT ciliary body involvement WITHOUT extraocular extension (or ciliary body involvement and extraocular extension not stated) AND stated as Tumor Size Category 4 Stated as T4a with no other information on extension	T4a	T3	L	L
415	Tumor WITH ciliary body involvement WITHOUT extraocular extension (or extraocular extension not stated) AND stated as Tumor Size Category 4 Stated as T4b with no other information on extension	T4b	T3	L	L
420	OBSOLETE DATA RETAINED V0200 Tumor greater than 10 mm but not more than 16 mm in greatest basal diameter and between 2.5 mm and 10 mm in maximum height (thickness), AND extraocular invasion unknown	ERROR	T2NOS	L	L
425	Tumor WITHOUT ciliary body involvement (or ciliary involvement not stated) WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 4 Stated as T4c with no other information on extension	T4c	T4	RE	RE
435	Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5mm in diameter AND stated as Tumor Size Category 4 Stated as T4d with no other information on extension	T4d	T4	RE	RE
440	OBSOLETE DATA RETAINED V0200 Tumor greater than 10 mm but not more than 16 mm in greatest basal diameter and between 2.5 mm and 10 mm in maximum height (thickness), WITHOUT microscopic extraocular invasion	ERROR	T2a	L	L
445	Stated as Tumor Size Category 4 NOS	T4NOS	T3	L	L
460	OBSOLETE DATA RETAINED V0200 Tumor greater than 10 mm but not more than 16 mm in greatest basal diameter and between 2.5 mm and 10 mm in maximum height (thickness), WITH microscopic extraocular invasion	ERROR	T2b	RE	RE
480	OBSOLETE DATA RETAINED V0200 Tumor greater than 10 mm but not more than 16 mm in greatest basal diameter and between 2.5 mm and 10 mm in maximum height (thickness), WITH macroscopic extraocular invasion	ERROR	T2c	RE	RE
635	Tumor WITH extraocular extension greater than 5mm in diameter Stated as T4e with no other information on extension	T4e	*	RE	RE
640	Stated as T4 NOS with no other information on extension	T4NOS	*	RE	RE
660	OBSOLETE DATA RETAINED V0200 Tumor greater than 16 mm in greatest diameter and/or greater than 10 mm in maximum height (thickness) WITHOUT extraocular extension	ERROR	T3	RE	RE
680	OBSOLETE DATA RETAINED V0200 Tumor greater than 16 mm in greatest diameter and/or greater than 10 mm in maximum height (thickness) WITH extraocular extension	ERROR	T4	RE	RE
800	Further contiguous extension	T4NOS	T4	D	D
950	No evidence of primary tumor	T0	T0	U	U
999	Unknown extension Primary tumor cannot be assessed Not documented in patient record	TX	TX	U	U

MelanomaChoroid

CS Extension