CUTANEOUS ROSAI-DORFMAN-DISEASE

We report a patient with purely cutaneous Rosai-Dorfman disease (RDD) who presented with a solitary, asymptomatic plaque on the back of her left thigh, with characteristic, large histiocytoid cells exhibiting e mperipolesis histologically. Cutaneous lesions occur in 27% of patient s with Lymph node involvement in RDD however purely cutaneous disease has only been reported on 18 previous occasions. The aetiology is unkn own, although it is thought to be a reactive disorder rather than neop lastic, possibly an immunological response to an infectious agent.