derm - conditions

An inflammatory disease of the pilosebaceous unit

A skin lesion that is abnormally sensitive to the effects of ultraviolet light (sunlight).

Thought to be a precancerous skin lesion that is more common in the fair-skinned or elderly individual. Approximately 20% of these skin lesions will develop into squamous cell carcinoma. Prevention includes the use of sun screen agents and the avoidance of drugs (for example tetracyclines) known to cause photosensitivity reactions. Usually a discreet slightly raised, red or pink lesion located on a sun exposed surface.

Texture may appear as rough, gritty or scaly. Growths may be biopsied to look for cancer or removed via cryotherapy or electrical cautery. Some topical agents may be used to promote peeling.

Pertaining to radiation (esp UV)

Excessive growth of horny tissue of the skin

Single or multiple elevated plaques and nodules often hyperpigmented with a hyperkeratotic greasy surface. They are benign, of unknown etiology, but have no connection with seborrhea

A chronic, non-contagious disease characterized by inflamed lesions covered with silvery-white scabs of dead skin.

A retention cyst of a sebaceous gland, containing cheesy yellow material, usually on the face, neck, scalp, or trunk.

A cyst caused by blockage of the excretory duct of a gland, so that glandular secretions are retained.

A benign cyst derived from the epidermis or the epithelium of a hair follicle; it is formed by cystic enclosures of epithelium within the dermis, filled with keratin and lipid-rich debris.

Relating to an eruption composed of papules and scales.

A skin disease typically appearing in people during their 30s and 40s. It is marked by redness (erythema) of the face, flushing of the skin, and the presence of hard pimples (papules) or pus-filled pimples (pustules), and small visible spider-like veins called telangiectasias. In later stages of the disease, the face may swell and the nose may take on a bulb-like appearance called rhinophyma.

A common inflammatory disease of the skin characterized by scaly lesions usually on the scalp, hairline, and face.

Uniformly light brown, sharply defined, and usually oval-shaped patches of the skin characteristic of neurofibromatosis, though also found in healthy individuals.

Sharply demarcated, blotchy, brown macules, usually in a symmetrical distribution on the cheeks and forehead and sometimes the upper lip and neck, often associated with pregnancy or other altered hormonal state.

A condition in which a loss of cells that give color to the skin (melanocytes) results in smooth, white patches in the midst of normally pigmented skin.

Hair loss, usually reversible, in sharply defined areas, usually involving the beard or scalp.

A vascular reaction of the upper dermis marked by transient appearance of slightly elevated patches (wheals) which are redder or paler than the surrounding skin and often attended by severe itching; the exciting cause may be certain foods or drugs, infection, or emotional stress.

Hypertrophy of the stratum corneum of the skin.