label: hereditary mucosal leukokeratosis
label_lc: hereditary mucosal leukokeratosis
description: "White sponge nevus (WSN) is a rare and autosomal dominant genetic disease in which the oral mucosa is white or grayish, thickened, folded, and spongy. The onset is early in life, and both sexes are affected equally. Other common sites include the tongue, floor of the mouth, and alveolar mucosa."