Pityriasis denotes fine scales and rosea translates as rose colored or pink.
PR can have a number of clinical variations. Its diagnosis is important, as it may resemble secondary syphilis. Its clinical presentation supports this concept. PR has been linked to upper respiratory infections, can cluster within families and close contacts and has increased incidence in the immunocompromised. As with viral exanthems, there may be an increased incidence in the fall and spring.