A premalignant condition usually of squamous epithelium. This is not a cancer, but the change that precedes a cancer. Since it is not a cancer, treatment is usually simple and usually completely effective.

Cancerous cells that are still contained within the tissue where they have started to grow and that have not yet become invasive or spread to other parts of the body.

a premalignant change and can become a cancer if not treated

Cancer that is still within its site of origin and has not spread to other tissues.

Type of 'pre-cancer' that develops into testicular cancer in 50% of cases. Often found in the second testis of men diagnosed with testicular cancer and needs regular checks.