What should you know about SCC keratoacanthoma type?

Keratoacanthoma is a dome-shaped growth with a firm edge and a central plug of keratin, the protein found in the outer layer of skin. The keratoacanthoma type of squamous cell carcinoma can develop and enlarge quickly, often on sun-exposed skin such as the face, ears, neck, forearms or backs of the hands. It may look like an inflamed spot, wart or boil, so appearance alone cannot establish the diagnosis.

A dermatologist may use magnification to inspect the lesion and will often recommend a biopsy or removal so a pathologist can examine the cells. This distinction matters because a keratoacanthoma-like growth may behave differently from other skin lumps, while untreated squamous cell carcinoma can extend into nearby tissue.

Arrange a dermatology appointment promptly, especially if the lump has changed noticeably over a short time. Do not squeeze, cut, freeze or repeatedly apply wart or acne products to it. Note when it appeared, how it has changed, whether it bleeds or crusts, and any tenderness; a clear photograph can help show the change between visits.

Treatment is chosen according to the lesion's size, site, depth, biopsy findings and your general health. Options may include surgical excision, which removes the growth with a margin of surrounding skin, or curettage and cautery, which scrapes away the lesion and treats the base. Your clinician will explain wound care, expected scarring and whether further treatment is needed.

Seek a prompt dermatology assessment for a new, fast-growing, firm or crater-like lump, or for a sore that repeatedly crusts or bleeds. Contact a clinician sooner if it is near the eye, nose, lip or ear, becomes increasingly painful, or shows spreading redness, swelling or discharge. Urgent medical advice is appropriate for heavy bleeding that does not settle with steady direct pressure.

A suspected lesion should not be watched indefinitely at home simply because it resembles a spot. Protect the area from further sun exposure with clothing or shade while waiting for assessment; broader information about sun-related skin change is available under Sun-Damaged Skin.

Ask whether the growth needs a biopsy, which treatment fits its location and depth, how the wound will be closed or dressed, and what changes should prompt a follow-up visit. You can also ask about sun protection and how to check nearby skin for new or changing lesions.