The Dermatology Site

What is Bowen’s Disease? Bowen’s disease is carcinoma in situ (the transformed cells remain confined to the epidermis above the basement membrane) derived from epidermal keratinocytes. It can progress to squamous cell carcinoma. It appears as an erythematous scaling or crusted patch, which may  slowly enlarge. Bowen’s disease may also occur on mucous membranes, such as the [...]

What is actinic keratosis? Actinic keratosis appears as an ill-defined red-yellow rough patch or papule with adherent scale distributed in sun-exposed areas such as the head, neck, and back of the hands. It is commonly found in a background of other signs of photoaging, such as solar elastosis and lentigines. Actinic keratosis is considered a [...]