The stage of melanoma skin cancer tells you how thick it is and how far it has spread. Doctors use different systems to stage melanoma. These include the TNM system and number staging system. The ...

Stage 1 can be divided into 1A and 1B. Doctors also use another staging system for melanoma called the TNM staging system. It stands for Tumour, Node, Metastasis. T describes the size of the tumour N ...