2 doctors weighed in:

Can skin cancer always start on the skin?

2 doctors weighed in
Dr. Carlos Encarnacion
Internal Medicine - Oncology
1 doctor agrees

In brief: Yes

Skin cancer, in any of its varieties, starts in the skin.
There are similar cancers that can start in other sites but they would not be called skin cancer. Also, other cancers can spread to the skin but again, you don't call it skin cancer. The cancer is usually named by its place of origin.

In brief: Yes

Skin cancer, in any of its varieties, starts in the skin.
There are similar cancers that can start in other sites but they would not be called skin cancer. Also, other cancers can spread to the skin but again, you don't call it skin cancer. The cancer is usually named by its place of origin.
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