logo An overview of dermatology

Introduction to dermatology

Overview key points test

White-skinned New Zealanders are particularly prone to conditions relating to excessive exposure to: * Infrared radiation * Microwaves *! Ultraviolet radiation * Ionising radiation Explanation: Solar keratoses and skin cancer are very common in New Zealanders with white skin. This is due to lack of endogenous melanin, outdoor lifestyle, inadequate protection, clear skies and high levels of ambient ultraviolet radiation. Skin diseases prevalent in the tropics are mostly: *! Infections * Occupational dermatoses * Allergic reactions * Toxic reactions to poisons Explanation: In tropical countries the greatest burden of skin diseases is due bacterial and fungal infection and infestations, which are often poorly recognized and inadequately treated. For occupational skin disease, which statement is correct? * Allergic contact dermatitis is more common than irritant contact dermatitis *! Irritant contact dermatitis is more common than allergic contact dermatitis Explanation: Irritant contact dermatitis is much more common than allergic contact dermatitis but the two states often coexist and predispose to each other The most common occupational skin problem is: * Foot dermatitis *! Hand dermatitis * Facial dermatitis * Scalp dermatitis Explanation: Occupational skin disease is most often contact dermatitis affecting the hands, because of their exposure to irritants and allergens. Disturbance of body image is particularly serious if it arises during: * Old-age * Infancy * Middle-age *! Adolescence Explanation: Adolescents are very vulnerable to the psychological and social impacts of skin diseases as they are developing their personalities. Peer acceptance is very important to the teenager. Physical appearance and attractiveness is highly linked with peer status.