Seborrheic keratosis is a common non-cancerous skin growth that appears on the skin, typically in middle-aged or older adults. They can vary in appearance, but there are several common types of seborrheic keratosis:
- Stucco Keratosis: Stucco keratoses are small, white or flesh-colored growths with a rough or warty texture. They often look like they are stuck on the skin.
- Dermatosis Papulosa Nigra: This type is most common in people with darker skin tones. It presents as small, dark, raised lesions, often on the face and neck.
- Leser-Trélat Sign: This is a rare and aggressive form of seborrheic keratosis characterized by the sudden appearance of multiple seborrheic keratoses that are often pruritic (itchy). It may be associated with internal malignancies.
- Pedunculated Seborrheic Keratosis: These growths have a stalk-like base and can appear similar to skin tags. They often dangle from the skin.
- Reticulated Seborrheic Keratosis: Reticulated keratoses have a lace-like or net-like appearance. They are flat or slightly raised and may be brown or black.
- Clonal Seborrheic Keratosis: These are waxy and slightly raised, with a somewhat greasy or stuck-on appearance. They can vary in color from light tan to dark brown.
- Acanthotic Seborrheic Keratosis: These keratoses are thick and hyperpigmented. They often appear on the face and can be quite dark.
- Backplane Seborrheic Keratosis: These growths have a flat surface without the typical warty texture, making them appear smoother.
It’s important to note that seborrheic keratoses are typically benign and do not require treatment unless they become symptomatic, such as when they become itchy, painful, or irritated. However, if you notice a change in a seborrheic keratosis’s appearance, such as bleeding, rapid growth, or irregular borders, it is important to have it evaluated by a dermatologist to rule out any concerning skin conditions. These growths can be removed for cosmetic reasons or if they become a source of discomfort or irritation.
