Knott Street Dermatology offers a wide array of dermatological treatments for patients with various skin conditions. One of these is Excimer (Xtrac®), which can address psoriasis and vitiligo.

Psoriasis is a skin disease causing red, itchy scaly patches, usually on the knees, elbows, torso and scalp. Vitiligo is a condition where the skin loses pigment, resulting in discolored patches in areas of the body.

Excimer (Xtrac®) is a form of laser treatment that utilizes ultraviolet (UVB) light to treat various skin diseases, including psoriasis and vitiligo. Exposure to beneficial high energy UV light is applied to the affected areas for varying lengths of time, while the UV rays that cause burning are eliminated. Total number of treatments and clearing time will vary by patient and condition. Though not a cure, this treatment can effectively control and improve these conditions. Since its invention in 1970, patients have used this treatment successfully and are often able to maintain clearance of improved skin for extended periods of time.

To learn more about treatments for skin conditions, contact Knott Street Dermatology for immediate consultation, or send in your queries through our website. Reach out to us today for a scheduled appointment to learn more. Knott Street Dermatology treats patients in and around Portland including Happy Valley, Clackamas, Gladstone, Damascus, Gresham, and Fairview.



Checkout our before and after gallery where we feature a few our recent patients. 






Our team is made up of experienced professionals
excited to help and provide personalized care just for you.

Tanya | Knott Street Dermatology | Skin Care Center | Portland Oregon

Tanya Wayne PA-C

Tanya is originally from North Dakota-the land of flax and canola and a place where everyone is empowered to be imperfect. Growing up active in sports lead her to North Dakota State University where she pursued a double major in Athletic Training and Exercise Science. Her upbringing set the stage for her love of sports, health, the outdoors and travel.

Tanya moved to Oregon in 2003 was accepted to Pacific University School of Physician Studies. She earned her MPAS and has been practicing medicine here for over 15 years. She is well versed in many areas of clinical practice but her passion has always been in aesthetics. Tanya is excited to be working with the team at Knott Street Aesthetics where the focus is on educating the public about evidence-based anti-aging strategies and techniques.

Aging is an inevitable phenomenon but also has a wonderful beauty we should have respect for. “

Olivia | Knott Street Dermatology | Skin Care Center | Portland Oregon

Olivia Gill LE,CAE

Olivia graduated from Spectrum Advanced Aesthetics in 2015 and has been working full time as a Certified Advanced Esthetician and Laser Safety Officer for the last 6 years. Olivia’s favorite part about her job is helping her patients feel more confident in their own skin. She takes pride in tailoring each skin care regimen and treatment plan to fit everyone’s lifestyle and budget. When she’s not pampering patients, she enjoys camping, traveling, and quality time spent with her family, husband, and Corgi puppy- Ginger!

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