| lichen sclerosus et atrophicus | A chronic, atrophic skin disease characterised by white, angular, flat, well-defined, indurated papules with an erythematous halo and follicular, black, keratotic plugs. It is the most common cause of kraurosis vulvae in females and balanitis xerotica obliterans in males. It is called also white spot disease and csillag's disease. (12 Dec 1998) |
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| lichen scrofulosorum | Small asymptomatic lichen papules on the trunk of children with tuberculosis; acid-fast bacilli are not seen in the dermal granulomas. Synonym: acne scrofulosorum, papular scrofuloderma, papular tuberculid. (05 Mar 2000) |
| lichen simplex chronicus | A thickened area of itching skin resulting from rubbing and scratching. (05 Mar 2000) |
| lichen striatus | A self-limited papular eruption occurring primarily in children (more commonly in females); the lesions are arranged in linear groups and usually occur on one extremity. (05 Mar 2000) |
| lichen strophulosus | An eruption of papules and vesicles at the orifices of sweat glands, accompanied by redness and inflammatory reaction of the skin. Synonym: heat rash, lichen infantum, lichen strophulosus, prickly heat, strophulus, summer rash, tropical lichen, lichen tropicus, wildfire rash. (05 Mar 2000) |
| lichen syphiliticus | Secondary eruption of small follicular papules, usually appearing as groups of lesions. Synonym: acuminate papular syphilid, lichen syphiliticus, miliary papular syphilid. (05 Mar 2000) |
| lichen tropicus | An eruption of papules and vesicles at the orifices of sweat glands, accompanied by redness and inflammatory reaction of the skin. Synonym: heat rash, lichen infantum, lichen strophulosus, prickly heat, strophulus, summer rash, tropical lichen, lichen tropicus, wildfire rash. (05 Mar 2000) |
| lichen urticatus | A sensitivity reaction to insect bites, especially human and pet fleas, seen mostly in young children as wheals followed by papules on exposed areas. Synonym: lichen urticatus, prurigo infantilis, urticaria papulosa. (05 Mar 2000) |