BCC originates in the bottom of the top layer of skin (epidermis). They often develop in sun-exposed areas such as the head, face, neck, shoulders and back. BCC is a common skin cancer, accounting for 70% of non-melanoma skin cancers.
BCC often grows slowly over months or years but if untreated, can invade deeper into the skin to cause nerve or tissue damage. BCC usually appears as a pearly lump or a dry, scaly area that is shiny and pale or bright pink. The lesion may ulcerate or bleed.
Risk factors include:
- Over-exposure to UV radiation from the sun
- Older age
- Family history of skin cancer
- Fair skin and a tendency to sunburn
- Weakened immune system
- Use of tanning beds