Notice: Users may be experiencing issues with displaying some pages on stanfordhealthcare.org. We are working closely with our technical teams to resolve the issue as quickly as possible. Thank you for your patience.
Stage 0 (Melanoma in situ): Cancer is confined to the top layer of the skin.
No chance of spread
Treated with surgery
May be treated after surgery with a cream applied to the skin
May be treated with the cream alone, if surgery is not an option
Stage I: Cancer has spread deeper into the skin (equal to or greater than 1 mm, stage IA or equal to or greater than 2 mmm stage IB), but has not spread to lymph nodes or other parts of the body. These tumors are graded according to their thickness to guide treatment options.
Stage II: Cancer has thickness greater than 2 millimeters.
Divided into IIA, IIB, IIC stages according to thickness (greater than 2 or less than 4 mm) and whether the tumor shows ulceration under the microscope.
Stage III: Cancer has spread to nearby lymph nodes, but not to distant lymph nodes or organs.
Stage IV: Cancer has spread to distant lymph nodes and other organs.