Back Skin Growths and Pigmentation Disorders Abnormal skin growths and abnormal pigmentation of the skin may be present at birth, or develop later in life. Many types of skin growths and pigmentation disorders require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. Birthmarks Other Benign Skin Growths Skin Pigment Disorders Skin Cancer Treatment for Skin Cancer