hanging curtain sign

hanging curtain sign

A clinical finding in the medallion lesion (a red, scaly patch) of patients with pityriasis rosea, which is evoked by stretching the skin across the long axis: the scales—being finer, lighter and attached at one end—tend to fold across the line of force (stretching). The resulting appearance has been fancifully likened to that of a hanging curtain that is similarly attached at one end by a cord and falls in folds at its long axis due to gravitational force.