Մասնակից:Լյուսի Բարսեղյան/Ավազարկղ

generally refers to a firmly attached white patch on a mucous membrane which is associated with an increased risk of cancer.[4][5] The edges of the lesion are typically abrupt and the lesion changes with time.[4][6] Advanced forms may develop red patches.[6] There are generally no other symptoms.[8] It usually occurs within the mouth, although sometimes mucosa in other parts of the gastrointestinal tract, urinary tract, or genitals may be affected