My wife was diagnosed with lichen planus some 7 years ago with white patches in her mouth. Treatment by a Dermatologists helps stabilise the condition in the first 2 years with re-occurrence now and then. Into its fourth year, it had spread to her genital area and on long term medication since then. Recently, about 2 months back, she had pain and swelling on her right knee. Blood tests ordered thru a Rhematologists revealed lupus erythematosus-lichen planus poverlap syndrome. Should she continue to be treated by the Rhematologist or best to be seen by her Dermatologist ?

Summarized question: Which specialist should I consult for lupus erythematosus-lichen planus overlap syndrome?