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Staging

Further context on cancer staging is available at TNM.

Metastatic melanomas can be detected by X-rays, CT scans, MRIs, PET and PET/CTs, ultrasound, LDH testing and photoacoustic detection. However, there is lack of evidence in the accuracy of staging of people with melanoma with various imaging methods.

Melanoma stages according to AJCC, 8th edition:

Stage 1 and 2 require an N (lymph node) class of:

Stage 1, 2 and 3 require an M (metastasis status) of:

Older systems include " Clark level " and " Breslow's depth ", quantifying microscopic depth of tumor invasion.