Stage 1B: Tumor thickness is 1 to 2 mm, and there's no ulceration. Stage 2A: Tumor is 1 to 2 mm thick and ulcerated, or it's 2 to 4 mm and not ulcerated. Stage 2B: Tumor is 2 to 4 mm thick and ulcerated, or it's more than 4 mm and not ulcerated. Stage 2C: Tumor is more than 4 mm thick and ulcerated.

Basic Differences Melanomas and carcinomas come from different cells in the skin. A carcinoma can come from two different types of cell. Basal cells are the most common culprit. They are located in the lower level of the epidermis.

Malignant skin neoplasms are cancerous. Early detection and treatment is important since almost all skin cancers can be cured by complete excision. There are several types of malignant skin growths. Basal cell carcinoma.

Basal cell carcinomas and squamous cell carcinomas are more common in older people. Melanomas are one of the most common cancers in younger people, especially in people ages 25 to 29. The risk of melanoma rises with age.