| UD | ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation... |
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| lichenoid dermatosis | Any chronic skin eruption, characterised clinically by induration and thickening of the skin with accentuation of skin markings, and microscopically by a band-like lymphocytic infiltration of the papillary dermis. (05 Mar 2000) |
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