KEY POINTS
- After Merkel cell carcinoma has been diagnosed, tests are done to find out if cancer cells have spread to other parts of the body.
- There are three ways that cancer spreads in the body.
- Cancer may spread from where it began to other parts of the body.
- The following stages are used for Merkel cell carcinoma:
- Stage 0 (carcinoma in situ)
- Stage IA
- Stage IB
- Stage IIA
- Stage IIB
- Stage IIC
- Stage IIIA
- Stage IIIB
- Stage IV