Seborrheic keratosis - Symptoms & causes - Mayo Clinic
2022年1月18日 · A seborrheic keratosis (seb-o-REE-ik ker-uh-TOE-sis) is a common noncancerous (benign) skin growth. People tend to get more of them as they get older. Seborrheic keratoses are usually brown, black or light tan.
Actinic keratosis - Symptoms & causes - Mayo Clinic
2022年12月17日 · An actinic keratosis (ak-TIN-ik ker-uh-TOE-sis) is a rough, scaly patch on the skin that develops from years of sun exposure. It's often found on the face, lips, ears, forearms, scalp, neck or back of the hands.
Seborrheic Keratosis: What Is It, Causes, Risks & Treatment
2021年8月27日 · What is seborrheic keratosis? A seborrheic keratosis (seb-o-REE-ik ker-uh-TOE-sis) is a common benign skin growth, similar to a mole. Most people will have at least one in their lifetime. They tend to appear in mid-adulthood and their frequency increases with age.
Actinic Keratosis (A Precancerous Condition) - Johns Hopkins …
What is actinic keratosis? Actinic keratosis is a rough, scaly patch or bump on the skin. It’s also known as a solar keratosis. Actinic keratoses are very common, and many people have them. They are caused by ultraviolet (UV) damage to the skin. Some actinic keratoses can turn into squamous cell skin cancer.
Keratosis - Wikipedia
Keratosis (from kerat-+ -osis) [1] is a growth of keratin on the skin or on mucous membranes stemming from keratinocytes, the prominent cell type in the epidermis. More specifically, it can refer to: actinic keratosis (also known as solar keratosis), a premalignant condition; chronic scar keratosis; hydrocarbon keratosis
Keratosis pilaris - Symptoms and causes - Mayo Clinic
2024年10月23日 · Keratosis pilaris (ker-uh-TOE-sis pih-LAIR-is) is a harmless skin condition that causes dry, rough patches and tiny bumps, often on the upper arms, thighs, cheeks or buttocks. The bumps usually don't hurt or itch.
Seborrheic Keratosis: Appearance, Causes, Treatment - Healthline
2024年5月24日 · Seborrheic keratosis is a type of harmless skin growth that can resemble melanoma. Discover symptoms, risk factors, signs to see a doctor, and more.
Seborrheic Keratosis - Symptoms, Causes & Treatment - WebMD
2024年4月18日 · Like moles, seborrheic keratosis happens when extra skin cells bunch up together on the top layer of skin. It can appear later in life, after about age 40. It can show up anywhere except your...
Seborrheic Keratosis vs. Actinic Keratosis: What to Know
2023年1月14日 · Keratosis refers to an overgrowth of the protein keratin in the skin. This excess keratin can appear in skin lesions that resemble patches, warts, or moles. Actinic keratoses tend...
Keratosis Pilaris: Symptoms, Causes, and Treatment - WebMD
2024年1月30日 · Keratosis pilaris is a common, harmless skin condition that causes small, hard bumps on your skin around clogged hair follicles. Your skin may look like it has goosebumps and feel rough like...