Vogt-Koyanagi-Harada disease: recurrence rates after initial-onset disease differ according to treatment modality and geographic area.

In the world at large, chronic evolution of initial-onset VKH disease treated with corticosteroids alone concerned two-thirds of patients. Japanese studies showed that chronic evolution was substantially less frequent, indicating possibly less severe disease in Japan. This proportion fell to almost zero when dual steroidal and non-steroidal immunosuppression was given at onset.