mucous patch

mucous patch n a broad flat syphilitic condyloma that is often marked by a yellowish discharge and that occurs on moist skin or mucous membranes

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a flat, rounded, gray to white erosion covered by a soft membrane with an erythematous zone, usually on the oral mucosa but sometimes on the anogenital mucosa, in early active secondary syphilis. It contains vast numbers of treponemes and is therefore highly contagious.

Medical dictionary. 2011.

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