Cutaneous squamous-cell carcinoma
Cutaneous squamous-cell carcinoma (cSCC), also known as squamous-cell carcinoma of the skin or squamous-cell skin cancer, is one of the three principal types of skin cancer, alongside basal-cell carcinoma and melanoma. cSCC typically presents as a hard lump with a scaly surface, though it may also present as an ulcer.
Source: Wikipedia — Cutaneous squamous-cell carcinoma (CC BY-SA 4.0)