Operated by Aclaris Therapeutics


A seborrheic keratosis (seb-or-ree-ik kare-uh-toe-sis), also known as SK or seb ker, is a benign (non-cancerous) growth of surface skin cells with pigment (color).

Learn More

SK or Skin Cancer?

“People have learned the ABCDE rule of melanoma so well that they apply it to any lesion that’s dark, growing and has irregular borders,” says Dr. Ringpfeil. “SK would seem to be in that category, but it’s not because its surface is different from the smooth surface of a pigment-producing growth, such as a mole or melanoma. Still, it’s important to bring to your doctor’s attention anything that is flat, ugly, fast-growing, and black or brown,” she says.

Read More

Spots and Age

Did you know that seborrheic keratosis (SK) can create different challenges depending on your age bracket?

What’s more, your feelings about SK can vary depending on your age. A few age-influenced SK scenarios:

  • Are you 40 and stricken with your first SK, while your friends are still fresh-faced? (And does it mean you’ll age faster?)
  • Are you 60 and stemming the scourge on your torso or back?
  • Do you wonder why your spots have gotten itchier as you’ve gotten older?
Read More

SK by the Numbers

Reference: Bickers et al, The Burden of Skin Disease, J Am Acad Dermatol, 2006;55:490-500

Ages of Patients with SKs

Reference: IMS National Disease and Therapeutic Index 2015.

Q&A With Dermatologist Experts

Featured Articles

Real People’s Stories – Female, 51

When her SKs appeared in her 40s, they multiplied fast. “They were like a snowball going downhill,” says this 51-year-old. “If I can slow down my SKs, I can slow down aging.” She doesn’t fuss over her appearance. She colors her own hair. She doesn’t wear makeup to...

read more

The King of SKs

Conquering these “Age Spots” in a Busy Boca Practice Seborrheic keratosis (SK) just might be the epidemic you’ve never heard of. Nearly half of all patients seeing dermatologists have SKs, according to a new national survey of dermatologists. * But even that sizable...

read more