Bullous Pemphigoid – Definition and Treatment

Definition of Bullous Pemphigoid Bullous Pemphigoid is an autoimmune disorder in which itchy bullae (blisterlike formations) develop on the SKIN. Bullous pemphigoid is more common in people age 50 and older, and typically occurs in those who are 70 or older. The bullae tend to concentrate in areas where there are skin folds, such as the groin and […]

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Erythema Multiforme – causes, symptoms and treatment

Definition of Erythema Multiforme Erythema Multiforme is a HYPERSENSITIVITY REACTION, commonly to medications and sometimes to viral INFECTION, in which circular, weltlike lesions resembling targets form on the arms, hands, legs, and feet. Lesions also often form on and around the lips and inside the mouth. The center of the LESION is typically pale and blistered, surrounded with a […]

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Lentigines – Dark Spots – Treatment

Definition of Lentigines Dark spots of varying size on the SKIN, also called freckles, liver spots, or age spots. Lentigines develop as a result of continued sun exposure and indicate damage to the skin. A single spot is a lentigo. Lentigines are often widespread on areas of skin that receive high sun exposure, such as the face and […]

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Pityriasis Rosea Rash – Symptoms and Treatment

Definition of Pityriasis Rosea Pityriasis Rosea is a common SKIN RASH in which an outbreak of lesions occurs and resolves over a period of 3 to 12 weeks, generally without treatment or complications. The lesions are characteristically oval with distinct borders and may be smooth (macules), raised (papules), or scaly (plaques). Often the lesions itch and sometimes they […]

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Tinea Versicolor – Definition and Treatment

Definition of Tinea Versicolor Tinea Versicolor is a fungal INFECTION of the SKIN that causes areas of altered pigmentation, usually darkened patches. Unlike other forms of TINEA, tinea versicolor is not contagious. The FUNGUS responsible, Malassezia furfur, is normally present on the skin (NORMAL FLORA). Dermatologists do not know why the fungus causes infection in some people and not in […]

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Callus – Definition, Removal and Treatment

Definition of Callus Callus is an accumulation of keratocytes that form a thickened area of SKIN in response to repeated friction or pressure, typically at the site of repeated blistering. A callus may be a different color than the surrounding skin, often grayish or yellowish. Calluses are most likely to develop on the palms, fingers, fingertips, heels, […]

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Erythema Nodosum – Symptoms and Treatment

Definition of Erythema Nodosum Erythema Nodosum – The eruption of red nodules along the top surfaces of the lower legs (shins). Erythema nodosum is nearly always a symptom of an underlying condition, often a streptococcal INFECTION, and represents INFLAMMATION of the fatty tissue at the foundation of the SKIN. Other symptoms include FEVER, PAIN and swelling in the joints, and generalized discomfort […]

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Lesion – Definition and Types

Definition of Lesion Lesion is a generalized term for any abnormal growth – can result from injury, disease, or surgery. Some lesions are malignant (cancerous) though most lesions are benign (noncancerous). Numerous types of lesions affect the SKIN. Their characteristics help define and diagnose disorders and conditions of the skin as well as systemic disorders that manifest […]

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Plaque, Skin – Definition, Symptoms and Treatment

Definition of Plaque (skin) Plaque (skin) – raised, hardened, scaly lesions that form on the SKIN. Plaques characterize numerous dermatologic conditions. They may itch, hurt, or flake and may occur in small clusters or cover large areas of skin. Treatment for skin plaques targets the underlying conditions and includes measures to moisturize or soften the skin to help […]

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Toxic Epidermal Necrolysis – Stevens Johnsons Syndrome

Definition of Toxic Epidermal Necrolysis Toxic Epidermal Necrolysis is a life-threatening inflammatory condition affecting the SKIN and underlying connective tissues, also called Stevens-Johnson syndrome. Toxic epidermal necrolysis usually results as an adverse drug reaction though may occur as a complication of INFECTION or CANCER. Doctors believe toxic epidermal necrolysis develops when an external event triggers the mechanism for programmed cell death […]

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