The skin cells (melanocytes) that develop into melanoma usually are found in the epidermis.
The bottom layer shown in the picture (subcutaneous layer) is not really part of the skin. It is a layer of connective tissue, fat cells, blood vessels, and nerves. This layer lies between the skin and the structures under it, such as muscles.
Skin depth varies depending on location. It is thin on the neck and thick on the soles of the feet.
Current as of: October 31, 2019
Author: Healthwise Staff Medical Review: E. Gregory Thompson, MD - Internal Medicine Brian O'Brien, MD, FRCPC - Internal Medicine Adam Husney, MD - Family Medicine Martin J. Gabica, MD - Family Medicine Amy McMichael, MD - Dermatology
Medical Review:E. Gregory Thompson, MD - Internal Medicine & Brian O'Brien, MD, FRCPC - Internal Medicine & Adam Husney, MD - Family Medicine & Martin J. Gabica, MD - Family Medicine & Amy McMichael, MD - Dermatology