cf842907___Melanoma_Research_Foundation__Description
[Melanoma Stage] IA [Treatment Option] The tumor and some surrounding tissue are removed surgically. Usually no further treatment is necessary. [Description] 
The tumor is less than 1 millimeter thick. The outer layer of skin does not look cracked or scraped (ulcerated). It has not spread to any lymph nodes or other organs.
Stages of Melanoma Diagnosis | Melanoma Research Foundation
Description