Physician Assistant Emily Phaneuf discusses Seborrheic Keratosis, commonly known as SK–a benign condition frequently encountered in older adults during routine full-body skin examinations.
She said these lesions can vary in color from light brown to black. Additionally, they are often characterized by their “stuck-on” and “scaly” appearance.
Although patients may be concerned, it’s important to remember that SKs are benign.
“They develop from an overproduction of immature keratinocytes, the predominant cells in the skin’s outermost layer, the epidermis,” said Phaneuf. “Factors such as age, genetic predisposition, and exposure to UV radiation contribute to their formation. SKs can start developing on the skin as early as 20-30 years old. Nearly all individuals over the age of 60 will have at least one SK.”
While SKs can manifest anywhere on the body except for the palms and soles, they are most commonly observed on the face and trunk. They can vary is size, ranging from a few millimeters to several centimeters in diameter. Individuals may present with a single lesion or multiple lesions scattered across the skin’s surface. Although typically asymptomatic, SKs can become irritated, resulting in mild discomfort and itching. This can occur especially when located in areas prone to friction.
Diagnosis
Diagnosis of SK primarily relies on clinical appearance, often supplemented by dermatoscopy, with biopsies seldom necessary unless uncertainty exists. Treatment is generally unnecessary unless for cosmetic reasons or if the lesions become bothersome. Common treatment modalities include cryotherapy, electrodesiccation and curettage (ED&C), or shave removal.
Phaneuf said that while SKs pose no malignant potential, it’s advisable to seek evaluation and proper diagnosis by a skin care specialist trained in dermoscopy for any concerning lesions. Understanding the characteristics and management of SKs empowers individuals to navigate their skin health confidently. As always, regular skin checks and monitoring of existing SKs are recommended to detect any changes in size, shape, or color.
Understanding Seborrheic Keratosis can help individuals be proactive to recognize and address these benign lesions, ensuring optimal skin well-being and peace of mind.
View more information on SK from Mayo Clinic.
Photo credit: Mayo Clinic