]> M-8720-8790 C69.3 Choroid Note: Laterality must be coded for this site. &commonsizemelanoma; CS Extension Note 1: Uveal melanomas arise most commonly in the choroid, less frequently in the ciliary body, and least often in the iris. Note 2: 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 3: 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 4: 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." Note 5: Use codes 150 through 180 if measurements are available to record the largest tumor basal diameter and tumor thickness. Only use codes 205 through 445 or 640 if measurements are not available for coding. Note that code 635, mapped to T4e, is not based on a Tumor Size Category assignment. Note 6: Only use codes 245, 295, 345, and 445 if the tumor size category is the only information available about the tumor. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 TX TX IS IS 150 ^ * L L 160 ^ * L L 170 ^ * RE RE 180 ^ * RE RE 205 T1a T1a L L 215 T1b T1a L L 220 ERROR T1NOS L L 225 T1c T1b RE RE 235 T1d T1b RE RE 240 ERROR T1a L L 245 T1NOS T1NOS L L 255 T2a T2a L L 260 ERROR T1b RE RE 265 T2b T2a L L 275 T2c T2b RE RE 280 ERROR T1c RE RE 285 T2d T2b RE RE 295 T2NOS T2NOS L L 300 Localized, NOS T1NOS T1NOS L L 305 T3a T3 L L 315 T3b T3 L L 325 T3c T4 RE RE 335 T3d T4 RE RE 345 T3NOS T3 L L 405 T4a T3 L L 415 T4b T3 L L 420 ERROR T2NOS L L 425 T4c T4 RE RE 435 T4d T4 RE RE 440 ERROR T2a L L 445 Stated as Tumor Size Category 4, NOS T4NOS T3 L L 460 ERROR T2b RE RE 480 ERROR T2c RE RE 635 T4e * RE RE 640 Stated as T4 [NOS] with no other information on extension T4NOS * L L 660 ERROR T3 L L 680 ERROR T4 RE RE 800 Further contiguous extension T4NOS T4 D D 950 No evidence of primary tumor T0 T0 U U 999 TX TX U U ^ For CS Extension codes 150-180, the T category for AJCC 7 staging is assigned based on the values of tumor basal diameter, recorded in CS Site-Specific Factor 2, and thickness, recorded in CS Site-Specific Factor. Basal diameter and thickness are mapped to Tumor Size Categories in the Tumor Size Category AJCC 7 Table, and the CS Extension codes and Tumor Size Categories are mapped to T in the Extension Size Category AJCC 7 Table. * For CS Extension codes 150-180, 635, and 640, the T category for AJCC 6 staging is assigned based on the values of tumor basal diameter, recorded in CS Site-Specific Factor 2, and thickness, recorded in CS Site-Specific Factor 3. Basal diameter and thickness are mapped to tumor size pairs in the Tumor Size Pair AJCC 6 Table, and the CS Extension codes and tumor size pairs are mapped to T in the Extension Size Pair AJCC 6 Table. &generalcstsexteval; &commonlymphnodeseye; &generalregnodeseval; &generalreglnpos; &generalreglnexam; &commonmetsatdxmelirisciliarychoroid; &generalmetseval; &commonssf1melanomairisciliarychoroid; &commonssf2melanoma; &commonssf3melanoma; &commonssf4melanoma; &commonssf5melanoma; &commonssf6melanoma; &commonssf7melanoma; &commonssf8melanoma; &commonssf9melanoma; &commonssf10melanoma; &commonssf11melanoma; &commonssf12melanoma; &commonssf13melanoma; &commonssf14melanoma; ¬appnewssf15; ¬appnewssf16; ¬appnewssf17; ¬appnewssf18; ¬appnewssf19; ¬appnewssf20; ¬appnewssf21; ¬appnewssf22; ¬appnewssf23; ¬appnewssf24; ¬appnewssf25; &commonhistinclusionmelanoma; ¬appsajcchistdrivensites; &commonstagemelanomachoroidciliarybodytnm7; &commonstagemelanomachoroidciliarybody; &commonsummarystage; &commontumorsizecategorymelanoma; &commontumorsizepairmelanoma; &commonextsizecategorymelanoma; &commonextsizepairmelanoma; &commonsizemetastasismelanoma;