Basal cell carcinoma (BCC) is generally considered the least serious form of skin cancer in terms of mortality. The risk of death from BCC is extremely low, with a mortality rate around 0.05% and metastasis (spread to other parts of the body) being very rare, estimated at 0.1% or less

. However, BCC is still a cancer that is locally invasive and can be aggressive. If left untreated, it can grow slowly but cause significant damage by destroying surrounding skin, cartilage, and even bone, leading to considerable disfigurement and wound care problems

. This local tissue destruction can seriously affect quality of life despite the low risk of fatality. The prognosis for most patients with primary BCC is excellent, especially when detected and treated early. Treatments typically have a high success rate, with 85-95% cure rates and very low recurrence when managed properly

. Nonetheless, having one BCC increases the risk of developing additional basal cell carcinomas over time, with about 15% of patients developing another within one year and up to 75% within five years for those with multiple prior BCCs

. In summary:

• BCC rarely spreads or causes death; mortality is very low (~0.05%)

• It can be locally invasive and cause serious tissue damage if untreated, leading to disfigurement

• Early diagnosis and treatment result in excellent survival and cure rates

• Patients with BCC have a higher likelihood of developing new BCC lesions over time

Therefore, while basal cell carcinoma is not usually life-threatening, it is a serious condition that requires timely treatment to prevent significant local damage and repeated occurrences.