Dermnet Videos
Nonmelanoma skin cancers Videos
- Basal Cell Nevus Syndrome
- Mohs’s Micrographic Surgery
- Sclerosing or Morpheaform Basal Cell Carcinoma
- Skin Cancer Basal Cell Carcinoma
- Skin Cancer Basal Cell Carcinoma Histology
- Skin Cancer Basal Cell Carcinoma Superficial Basal Cell Carcinoma
- Skin Cancer Basal Cell Carcinoma Treatment
- Skin Cancer Nodular Basal Cell Carcinoma
- Skin Cancer Pigmented Basal Cell Carcinoma
- Skin Cancer Cutaneous T-cell Lymphoma Definition and Description
- Skin Cancer Cutaneous T-cell Lymphoma Erythrodermic stage (Sezary syndrome)
- Skin Cancer Cutaneous T-cell Lymphoma Hematology and pathology
- Skin Cancer Cutaneous T-cell Lymphoma Patch Stage
- Skin Cancer Cutaneous T-cell Lymphoma Plaque stage
- Skin Cancer Cutaneous T-cell Lymphoma Stages
- Skin Cancer Cutaneous T-cell Lymphoma Treatment
- Skin Cancer Cutaneous T-cell Lymphoma Tumor stage
- Skin Cancer Squamous Cell Carcinoma
- Skin Cancer Squamous Cell Carcinoma Appearance
- Skin Cancer Squamous Cell Carcinoma Keratoacanthoma Variant
- Skin Cancer Squamous Cell Carcinoma of the Arms and Legs
- Skin Cancer Squamous Cell Carcinoma Relationship to HPV
- Skin Cancer Squamous Cell Carcinoma Transplant Patients
- Skin Cancer Squamous Cell Carcinoma Treatment
Video Topics
Actinic Keratosis Introduction
Actinic keratoses are very common. They are firm, keratotic lesion, usually found in sun-exposed areas. Actinic keratoses are precursors to squamous cell carcinoma, thus, they have malignant potential. They are caused by years of cumulative sun exposure, leading to DNA damage of keratinocytes. Roughly 5 to10% of actinic keratoses progress to invasive squamous cell carcinoma over several years. Although spontaneous regression of actinic keratoses can occur, the biologic behavior of each actinic keratosis cannot be predicted, thus, every lesion is treated as a precursor lesion.
Individual actinic keratoses become progressively more common after 40 years of age and are more common in lighter skin types. They occur along with other signs of sun damage, such as atrophy, uneven pigmentation and telangiectasias. They are predominately found on the face, scalp, ears and neck, as well as the dorsal hands. The lower lip equivalent to an actinic keratosis is called actinic cheilitis.