Ichthyosis hystrix, Curth Macklin type: A rare inherited skin disorder involving variable degrees of scaling, thickening and hardening of the skin which can occur anywhere on the body.
Thick skin Hard skin Scaly skin
Bowen’s disease Bowen’s disease is a common form of intraepidermal carcinoma that causes painless, erythematous plaques that are raised and indurated with a thick, hyperkeratotic scale and, possibly, ulcerated centers. Dermatitis Exfoliative dermatitis begins with rapidly developing generalized erythema. Desquamation with fine scales or thick sheets of all or most of the skin surface may cause life-threatening hypothermia. Other possible complications include cardiac output failure and septicemia. Systemic signs and symptoms include a low-grade fever, chills, malaise, lymphadenopathy, and gynecomastia. With nummular dermatitis, round, pustular lesions commonly ooze purulent exudate, itch severely, and rapidly become encrusted and scaly. Lesions appear on the extensor surfaces of the limbs, posterior trunk, and buttocks. Seborrheic dermatitis begins with erythematous, scaly papules that progress to larger, dry or moist, greasy scales with yellowish crusts. This disorder primarily involves the center of the face, the chest and scalp and, possibly, the genitalia, axillae, and perianal regions. Pruritus occurs with scaling. Dermatophytosis Tinea capitis produces lesions with reddened, slightly elevated borders and a central area of dense scaling; these lesions may become inflamed and pus-filled (kerions). Patchy alopecia and itching may also occur. Tinea pedis causes scaling and blisters between the toes. The squamous type produces diffuse, fine, branlike scales. Adherent and silvery white, they’re most prominent in skin creases and may affect the entire dorsum of the foot. Tinea corporis produces crusty lesions. As they enlarge, their centers heal, causing the classic ringworm shape. Lymphoma Hodgkin’s disease and non-Hodgkin’s lymphoma commonly cause scaly rashes. Hodgkin’s disease may cause pruritic scaling dermatitis that begins in the legs and spreads to the entire body. Remissions and recurrences are common. Small nodules and diffuse pigmentation are related signs. This disease typically produces painless enlargement of the peripheral lymph nodes. Other signs and symptoms include a fever, fatigue, weight loss, malaise, and hepatosplenomegaly. Non-Hodgkin’s lymphoma initially produces erythematous patches with some scaling that later become interspersed with nodules. Pruritus and discomfort are common; later, tumors and ulcers form. Progression produces nontender lymphadenopathy. Parapsoriasis (chronic) Parapsoriasis produces small or moderate-sized maculopapular, erythematous eruptions, with a thin, adherent scale on the trunk, hands, and feet. Removal of the scale reveals a shiny brown surface.