AJCC 8th-Edition Melanoma T Category
AJCC 8th-edition cutaneous-melanoma T category from Breslow thickness (with the 0.8 mm split) and ulceration — the a/b suffix and T element only.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Breslow thickness
- 1.5 mm
- Ulceration present
- Yes
Result: T2b — Breslow 1.5 mm, with ulceration.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Map
- T1 ≤ 1.0 mm (T1a < 0.8 mm no ulceration; T1b < 0.8 mm with ulceration, or 0.8–1.0 mm), T2 > 1.0–2.0, T3 > 2.0–4.0, T4 > 4.0; a = no ulceration, b = with ulceration for T2/T3/T4.
- Scope
- the T element only — nodal (N) and metastatic (M) categories are staged separately.
What you enter
- Breslow thickness
- Ulceration present
How this is calculated
Gershenwald JE, Scolyer RA, Hess KR, et al. Melanoma staging: evidence-based changes in the AJCC eighth edition cancer staging manual. CA Cancer J Clin. 2017;67(6):472-492. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.