Melanoma in situ, this is when the cancer only occurs in the top layer of skin.
The cancer is found only in the skin, but the tumor has grown thicker. In stage 1A, the skin covering the melanoma remains intact. In stage 1B, the skin covering the melanoma has broken open.
The melanoma has grown with the thickness ranging from 1.01 mm to greater than 4 mm. it is important to note that the cancer still has not spread to nearby skin.
The melanoma has spread to either:
• One or more nearby lymph node (often called a lymph gland)
• Nearby skin
This is the most advanced stage. It means that the melanoma has spread to one or more parts of the body either an internal organ, a lymph node adjacent to the melanoma; or another skin tissue that is far from where the melanoma was first discovered.