The major forms of dermatitis include atopic (see Ch. 10 ), contact (see Ch. 12 ), seborrheic, asteatotic (xerotic), stasis, and nummular. Dermatitis of special sites – i.e. hands, feet, lips, eyelids, diaper area, and major body folds – is…
Introduction Common inflammatory skin disease that affects 10–25% of children and 2–10% of adults in most high-income and some low-income countries. Eczematous dermatitis characterized by intense pruritus and a chronic or chronically relapsing course. Sequelae often include sleep disturbances, psychological…
Lichen Planus Idiopathic disorder that can affect the skin, hair, nails, and/or mucosae (oral, vulvovaginal) and most commonly affects adults. May represent a T-cell-mediated autoreactive disorder against keratinocytes whose self-antigens have been altered by trauma or infection (e.g. HCV). Flat-topped…
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Parapsoriasis Chronic, usually asymptomatic patches or thin plaques with fine scale whose color varies from pink to red-brown; may have associated epidermal atrophy and occasionally poikiloderma (large plaque parapsoriasis). Two major forms of parapsoriasis are small plaque (lesions usually <5…
Key Points Affects up to 2% of the population. Chronic disorder in those with a polygenic predisposition combined with triggering factors such as infections (especially streptococcal infection, but also HIV infection) or medications (e.g. interferon, β-blockers, lithium, or oral CS…
Introduction Psychodermatology refers to any aspect of dermatology in which psychological factors play a significant role. Psychodermatologic disorders can be classified in two ways: (1) by the specific psychodermatologic condition or (2) by the underlying psychopathology ( Fig. 5.1 ).…
Definitions Pruritus: an unpleasant sensation of the skin that elicits a desire to scratch. Dysesthesia: an unpleasant, abnormal sensation that can be either spontaneous or evoked; abnormal, unpleasant sensations may include pain, pruritus (“neuropathic itch”), tingling, burning, “pins and needles”.…
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A range of bedside diagnostic procedures are performed to assist in the diagnosis of skin disorders. The most commonly performed procedures include microscopic examination of skin scrapings mounted in either potassium hydroxide (KOH) or mineral oil and microscopic examination of…