I understand your concern.
It's good to know that basal cell carcinoma is a cancer that very rarely gives distant metastasis (basal cell carcinoma may spread to tissues around the cancer, but it usually does not spread to other parts of the body).
Most of the cases are treated completely, when the lesion is removed.
Having a lesion of 1 cm, defines cancer as a stage 1 (tumor of 2 centimeters or smaller)
Treated site needs to be monitored, cause possible second cancer usually develops near the first one.
Individuals with BCC have a 30% greater risk of having another BCC unrelated to the previous lesion in following 3 years.
Practice self examinations monthly, checking for lesion that want heel, or, has grown in a meantime.
Arrange skin exam with your dermatologist every six months to one year.