cf842907___Melanoma_Research_Foundation__Description
[Melanoma Stage] IIB [Treatment Option] The tumor and some surrounding tissue are removed surgically. Additional treatment(s) may be recommended. [Description] 
The tumor is either 2–4 millimeters thick and ulcerated, or more than 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