| D007971 |
Leukoplakia |
A white patch lesion found on a MUCOUS MEMBRANE that cannot be scraped off. Leukoplakia is generally considered a precancerous condition, however its appearance may also result from a variety of HEREDITARY DISEASES. |
Leukokeratosis,Leukoplakic Lesions,Lesion, Leukoplakic,Lesions, Leukoplakic,Leukokeratoses,Leukoplakias,Leukoplakic Lesion |
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| D008010 |
Lichen Planus |
An inflammatory, pruritic disease of the skin and mucous membranes, which can be either generalized or localized. It is characterized by distinctive purplish, flat-topped papules having a predilection for the trunk and flexor surfaces. The lesions may be discrete or coalesce to form plaques. Histologically, there is a "saw-tooth" pattern of epidermal hyperplasia and vacuolar alteration of the basal layer of the epidermis along with an intense upper dermal inflammatory infiltrate composed predominantly of T-cells. Etiology is unknown. |
Cutaneous Lichen Planus,Lichen Planopilaris,Lichen Ruber Planus,Mucosal Lichen Planus,Lichen Rubra Planus,Lichen Planus, Cutaneous,Lichen Planus, Mucosal,Planopilaris, Lichen |
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| D008179 |
Lupus Erythematosus, Discoid |
A chronic form of cutaneous lupus erythematosus (LUPUS ERYTHEMATOSUS, CUTANEOUS) in which the skin lesions mimic those of the systemic form but in which systemic signs are rare. It is characterized by the presence of discoid skin plaques showing varying degrees of edema, erythema, scaliness, follicular plugging, and skin atrophy. Lesions are surrounded by an elevated erythematous border. The condition typically involves the face and scalp, but widespread dissemination may occur. |
Lupus Erythematosus, Chronic Cutaneous,Lupus Erythematosus, Cutaneous, Chronic,Discoid Lupus Erythematosus |
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| D009059 |
Mouth Diseases |
Diseases involving the MOUTH. |
Disease, Mouth,Diseases, Mouth,Mouth Disease |
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| D011230 |
Precancerous Conditions |
Pathological conditions that tend eventually to become malignant. |
Preneoplastic Conditions,Condition, Preneoplastic,Conditions, Preneoplastic,Preneoplastic Condition,Condition, Precancerous,Conditions, Precancerous,Precancerous Condition |
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