Pathologic T
This input is used for staging
Notes
**Note 1:** Assign 88 for in situ cases (behavior code /2). TNM does not include an in situ category for choroid tumors. **Note 2:** Melanomas of the uvea arise most commonly in the choroid, less frequently in the ciliary body, and least often in the iris. Melanomas of the iris tend to be small, and those arising from or extending to the ciliary body typically are large. **Note 3:** UICC 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. (1) **Note 4:** In clinical practice, the largest tumor basal diameter may be estimated in optic disc diameters (dd, average: 1 dd = 1.5 mm). 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. Ciliary body involvement can be evaluated by the slit-lamp, opthalmoscopy, gonioscopy and transillumination. However, high frequency ultrasonography (ultrasound biomicroscopy) is used for more accurate assessment. Extension through the sclera is evaluated visually before and during surgery, and with ultrasonography, computed tomography or magnetic resonance imaging. (1) **Note 5:** When histopathological measurements are recorded after fixation, tumor diameter and thickness may be underestimated because of tissue shrinkage. (1)NAACCR Item
NAACCR #880| Pathologic T | Pathologic T Display | Description | Registrar Notes |
|---|---|---|---|
| pX | pTX | Primary tumor cannot be assessed | Basal diameter and thickness not known Tumor size category not known Pathologic classification criteria met, evaluation done: Physician unable to assess T Surgical resection of primary tumor, extension not stated Physician assigns pTX, no other information available to determine T |
| p0 | pT0 | No evidence of primary tumor | |
| p1 | pT1 | Tumor size category 1 | Note: T1 has subcategories of T1a, T1b, T1c and T1d. Assign T1 only when there is no information available to assign one of the subcategories Tumor Size Category 1 Localized, NOS Stated as T1 [NOS] |
| p1A | pT1a | WITHOUT ciliary body involvement and extraocular extension | Tumor WITHOUT ciliary body involvement WITHOUT extraocular extension OR ciliary body involvement and extraocular extension not stated AND stated as Tumor Size Category 1 Stated as T1a |
| p1B | pT1b | WITH ciliary body involvement | Tumor WITH ciliary body involvement WITHOUT extraocular extension OR extraocular extension not stated AND stated as Tumor Size Category 1 Stated as T1b |
| p1C | pT1c | WITHOUT ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITHOUT ciliary body involvement OR ciliary involvement not stated WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 1 Stated as T1c |
| p1D | pT1d | WITH ciliary body involvement AND Extraocular extension less than or equal to 5 mm in diameter |
Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 1 Stated as T1d |
| p2 | pT2 | Tumor size category 2 | Note: T2 has subcategories of T2a, T2b, T2c and T2d. Assign T2 only when there is no information available to assign one of the subcategories Tumor Size Category 2 Stated as T2 [NOS] |
| p2A | pT2a | WITHOUT ciliary body involvement and extraocular extension | 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 |
| p2B | pT2b | WITH ciliary body involvement | Tumor WITH ciliary body involvement WITHOUT extraocular extension OR extraocular extension not stated AND stated as Tumor Size Category 2 Stated as T2b |
| p2C | pT2c | WITHOUT ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITHOUT ciliary body involvement OR ciliary involvement not stated WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 2 Stated as T2c |
| p2D | pT2d | WITH ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 2 Stated as T2d |
| p3 | pT3 | Tumor size category 3 | Note: T3 has subcategories of T3a, T3b, T3c and T3d. Assign T3 only when there is no information available to assign one of the subcategories Tumor Size Category 3 Stated as T3 [NOS] |
| p3A | pT3a | WITHOUT ciliary body involvement and extraocular extension | 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 |
| p3B | pT3b | WITH ciliary body involvement | Tumor WITH ciliary body involvement WITHOUT extraocular extension OR extraocular extension not stated AND stated as Tumor Size Category 3 Stated as T3b |
| p3C | pT3c | WITHOUT ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITHOUT ciliary body involvement OR ciliary involvement not stated WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 3 Stated as T3c |
| p3D | pT3d | WITH ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 3 Stated as T3d |
| p4 | pT4 | Tumor size category 4 | Note: T4 has subcategories of T4a, T4b, T4c, T4d and T4e. Assign T4 only when there is no information available to assign one of the subcategories Tumor Size Category 4 Further contiguous extension Stated as T4 [NOS] |
| p4A | pT4a | WITHOUT ciliary body involvement and extraocular extension | 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 |
| p4B | pT4b | WITH ciliary body involvement | Tumor WITH ciliary body involvement WITHOUT extraocular extension OR extraocular extension not stated AND stated as Tumor Size Category 4 Stated as T4b |
| p4C | pT4c | WITHOUT ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITHOUT ciliary body involvement OR ciliary involvement not stated WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 4 Stated as T4c |
| p4D | pT4d | WITH ciliary body involvement but WITH extraocular extension less than or equal to 5 mm in diameter |
Tumor WITH ciliary body involvement WITH extraocular extension less than or equal to 5 mm in diameter OR extraocular extension diameter not stated AND stated as Tumor Size Category 4 Stated as T4d |
| p4E | pT4e | Any tumor size category with extraocular extension more than 5 mm in diameter | Tumor WITH extraocular extension greater than 5 mm in diameter AND stated as Tumor Size Category 4 Stated as T4e |
| 88 | 88 | Not applicable | In situ case but no pTis is defined by TNM Death certificate only (DCO) case |
| <BLANK> | BLANK | See Registrar Notes | Pathologic classification criteria not met Pathologic classification criteria met, evaluation done: Results not documented in patient record No surgical resection of known primary tumor (not T0) Resection insufficient for site-specific pathologic assessment No surgical resection of primary tumor and there isn’t a positive biopsy of a structure in the highest T category and highest N category Evidence of metastatic disease (pM1), no other workup Only Pathologic Stage Group documented (no T, N, or M information available) |