Measles physical examination
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Vidit Bhargava, M.B.B.S [2]
Overview
Measles is a condition, that is best diagnosed clinically based on a constellation of signs and symptoms. Koplik's spots, rash and conjunctivitis are 3 major physical findings that must be looked out for, while making the diagnosis of measles.
Physical Examination
Measles is a condition, that is best diagnosed clinically based on a constellation of signs and symptoms. On physical examination the following are pathognomic for measles:
Koplik's spots
Koplik's spots are tiny white spots with erythematous base and bluish-white centers found inside the mouth at the base of second molars. These appear usually 2-3 days after initial prodrome and may or may not persist until the rash disappears. Although they are pathognomic, Koplik's spots are not present in all the cases. Its absence does not exclude the diagnosis of measles.
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Image showing bluish-grey spots on an erythematous base known as Koplik's spots -
Image showing Koplik's spots opposite the base of second molars.
Rash
Three to five days after the start of symptoms, a red or reddish-brown itchy rash appears. The rash usually begins on a person’s face at the hairline and spreads downward to the neck, trunk, arms, legs, and feet. It also regresses in the same manner as it appeared in about 5-7 days. The rash is blanching, maculopapular in nature to begin with but may coalesce later to become plaques and patches. When the rash appears, a person’s fever may spike to more than 104°F. Shown below are images depicting the characteristic rash of measles:
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Image showing measles rash on day 3. -
Image showing characteristic day 4 appearance of measles rash. -
Typical appearance of rash on day 3, measles. -
Face of child with measles.
Conjunctivitis
Conjuntivitis, also known as pink eye, is one of the 3 'C' 's in the classical 3 'C' presentation of measles (other 2 being cough and coryza). Shown below is an image illustrating pink eye in a child with measles:
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Pink eye in a child with conjunctivitis
