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target lesionDermatology A lesion typical of erythema multiforme–EM in which a vesicle is surrounded by an often hemorrhagic maculopapule; EM is often self-limited, of acute onset, resolves in 3-6 wks, and has a cyclical pattern; EM lesions are 'multiform' and include macules, papules, vesicles, bullae Etiology Idiopathic or follow infections, drug therapy or occur in immunocompromised hosts
target lesioncharacteristic skin lesion of erythema multiforme
any pathological or traumatic discontinuity of tissue or loss of function of a part. Lesion is a broad term, including wounds, sores, ulcers, tumors, cataracts and any other tissue damage. They range from the skin sores associated with eczema to the changes in lung tissue that occur in tuberculosis.
see target lesion.
1. an object or area toward which something is directed, e.g. target animal, population, level or nucleotide sequence.
2. the area of the anode of an x-ray tube where the electron beam collides causing the emission of x-rays.
3. a cell or organ that is affected by a particular agent, e.g. a hormone or drug.
see target cell.
the distance from the target of the x-ray tube and the plane of the x-ray film.
skin lesion consisting of annular or arciform areas of erythema with central pigmentation. Associated with bacterial hypersensitivity and seborrheic dermatitis. Called also bull's eye lesion.
in herd health programs target performances are set up in a number of production and health functions in order to provide an incentive and give some measure of performance other than an absolute one. This enables farmers to be rated on their effective performance in spite of the great variations that can occur between them in basic resources.