WASHINGTON – Jerry Tan, MD, said at the annual meeting of the American Academy of Dermatology.
Dr. Jerry Tan
A “large majority” of patients present with active acne scarring, even those with mild and moderate disease, said Dr. Tan of the University of Western Ontario, London. The stigma associated with acne and scarring is real – in one survey, 41% of respondents noted that acne was the first thing they noticed about a person’s face (Dermatol Ther. 2016;6[2]:207-18).
“Patients with scars are stigmatized because they are perceived as being less attractive,” Dr. Tan said. “They’re perceived as being less healthy, less confident, all those negative attributes because they have developed something that was not of their own making.”
Dr. Tan presented results from his own group that estimated the risk factors of scarring. They found factors such as acne severity (odds ratio, 3.68; 95% confidence interval, 2.58-5.23), a family history of acne scarring (OR, 2.14; 95% CI, 1.67-2.76), acne duration (OR, 1.63; 1.09-2.47), and manipulation (picking and squeezing) behaviors (OR, 1.70; 95% CI, 1.27-2.29) increased the risk of acne scarring (J Eur Acad Dermatol Venereol. 2017 Sep;31[9]:1547-54). However, in a separate study, they found acne scarring and repair was an ongoing process: Of 32 patients with moderate inflammatory acne studied for 6 months, 36% of scars that were discovered within the study period were not present at follow up (J Drugs Dermatol. 2017 Jun 1;16[6]:566-72).
“I came from an era where we were taught that acne scars, when they developed, were permanent. This suggests based on good evidence that it’s not,” Dr. Tan said.
Adapalene has been successful in improving the skin texture and severity of acne scars, Dr. Tan said, citing a study that showed once-daily adapalene 0.3% gel showed a moderate to complete improvement in scar severity in 77.8% of patients and a slight improvement in 22.2% of patients (Dermatol Ther. 2018;8[2]:245-57). Increasing the dose helped: 32.9% of patients using topical adapalene 0.3% combined with benzoyl peroxide 2.5% gel at 24 weeks were clear or almost clear according to Scar Global Assessment scores, compared with 16.4% of patients randomized to vehicle (Am J Clin Dermatol. 2018 Apr;19[2]:275-86).
For established scars, many treatment modalities are available, with varying levels of evidence supporting their use. Ice pick scars are commonly treated with chemical reconstruction of skin scars (CROSS), punch techniques, and radiofrequency (RF). Rolling acne scares can be treated with dermabrasion, dermal fillers, RF, skin needling, subcision as well as ablative, nonablative and fractional lasers. Shallow boxcar scars are treated with dermabrasion, dermal fillers, RF, skin needling and subcision as well as ablative, nonablative, fractional lasers; deeper boxcar scars can be treated with RF and punch techniques.
Among these techniques, Dr. Tan said there is level I evidence to use subcision and dermal fillers with rolling acne scars and CROSS with trichloroacetic acid for ice pick and boxcar scars; and for boxcar and rolling scars, ablative and nonablative lasers, microneedling in combination with platelet-rich plasma, RF microneedle or fractional bipolar therapy.
“Remarkably atrophic acne scars can repair spontaneously. Our job is to get more willing to repair spontaneously,” Dr. Tan said. “And we think we can push that to that end with topical retinoids. Topical retinoids can reduce scar formation and certainly there are lots of corrective procedures that can help our patients.”
Dr. Tan reported relationships with Abbott Laboratories, Allergan, Avene, Bayer, Boots, Cipher Pharmaceuticals, Dermira, Eli Lilly, Galderma Laboratories, Galderma Research & Development, F. Hoffman–La Roche, Janssen Pharmaceuticals, Leo Pharma, Lilly ICOS, Pfizer, Proctor & Gamble, Stiefel, and Valeant Pharmaceuticals International.
SOURCE: Tan J et al. AAD 19, Symposium 012.