Koplik's spots are bluish-white spots seen on the buccal mucosa (mucous membrane of the inside of the cheek) and are pathognomonic of measles. They are named after Henry Koplik (1858-1927), an American pediatrician who first described them in 1896. The mucous membranes (or mucosa) are linings of ectodermic origin, covered in epithelium, that line various body cavities and internal organs. ... Measles, also known as rubeola, is a common disease caused by a virus of the genus Morbillivirus. ... Pediatrics (also spelled paediatrics or pædiatrics) is the branch of medicine that deals with the medical care of infants and children. ...

They often appear a few days before the rash arrives and can be a useful sign to look for in children known to be exposed to the measles virus. Measles, also known as rubeola, is a common disease caused by a virus of the genus Morbillivirus. ...