When a dermatologist determines that a wart or mole is noncancerous, the approach focuses on safe removal or destruction to resolve symptoms, improve appearance, or prevent irritation. The treatment plan depends on the specific type of lesion, its location, the patient's health history, and the dermatologist's clinical judgment. It is important to remember that these treatments are for confirmed benign growths; any lesion with suspicious features should be biopsied first to rule out malignancy.
Treating Noncancerous Warts
Warts are caused by the human papillomavirus (HPV) and can be stubborn. Dermatologists have several effective options to remove them. The choice often involves factors like the wart's size, number, and location.
Common in-office treatments:
- Cryotherapy: Liquid nitrogen is applied to freeze the wart tissue. This causes a blister to form, and the dead tissue falls off within a week or two. Multiple sessions may be needed, especially for larger or thicker warts.
- Cantharidin: A blistering agent is painted onto the wart. The area is covered, and the wart lifts off painlessly over several days as a blister forms. This is often used for common warts in children.
- Surgical removal: A dermatologist may use a curette (a small scooping instrument) to scrape off the wart after numbing the area. Electrosurgery (burning) or laser treatment may also be used to destroy wart tissue.
- Topical prescription treatments: For persistent or multiple warts, prescription-strength creams like imiquimod or tretinoin can help stimulate the immune system to fight the virus. Fluorouracil cream may also be used in some cases.
- Laser therapy: Pulsed-dye or carbon dioxide lasers can destroy the blood supply to the wart or vaporize the tissue. This is often reserved for warts that have not responded to other treatments.
For plantar warts (on the soles of the feet), dermatologists may also use strong chemical peels like salicylic acid under tape occlusion, or Intralesional immunotherapy (injecting an antigen like mumps or Candida to provoke an immune response).
Treating Noncancerous Moles
Moles, or nevi, are clusters of melanocytes (pigment-producing cells). If a mole is benign but bothersome, a dermatologist can remove it for cosmetic reasons or because it interferes with clothing or grooming (e.g., rubbing from a bra strap). The goal is safe removal with minimal scarring.
Common removal methods:
- Shave excision: The dermatologist numbs the area, then uses a small blade to shave off the mole flush with the skin. Sometimes a thin layer of the remaining base is cauterized to stop bleeding. This technique is common for raised, dome-shaped moles. It does not require stitches and generally heals with a flat scar.
- Punch biopsy or excision: For flat moles or those where the dermatologist wants to remove the entire depth of the mole, a punch tool (a circular blade) is used to remove the mole and a small margin of surrounding skin. The wound is closed with one or two stitches. This method is often preferred for moles that are symmetric, uniform in color, and completely benign but need full removal. The removed tissue is sent to a lab to confirm benignity.
- Surgical excision: For larger or deeper benign moles, a scalpel is used to cut out the mole and a small rim of normal skin. The area is closed in layers with stitches. This provides precise control and can result in a fine scar.
Post-Treatment Care and What to Expect
After any treatment, the dermatologist will give specific wound care instructions. Common advice includes keeping the area clean and dry, applying antibiotic ointment, and avoiding picking at scabs or blisters. Scarring is a possible outcome, but proper care and sun protection can minimize it. Follow-up is usually scheduled to ensure the lesion has healed properly and to check for any recurrence, especially with warts. If a mole was removed, full pathology results confirm its benign nature.
It is critical to emphasize that only a board-certified dermatologist can accurately distinguish a benign lesion from a cancerous one. Self-treatment of moles or warts at home with over-the-counter freezing kits or cutting tools is not recommended and can lead to infection, scarring, or mishandling of a potential malignancy. Always consult a dermatologist for any new, changing, or concerning skin growth.