cf842907___Melanoma_Research_Foundation__Description
[Melanoma Stage] IIA [Treatment Option] The tumor and some surrounding tissue are removed surgically. Usually no further treatment is necessary. [Description] 
The tumor is either 1–2 millimeters thick and ulcerated, or 2–4 millimeters thick and not ulcerated. It has not spread to any lymph nodes or other organs.
Stages of Melanoma Diagnosis | Melanoma Research Foundation
Description