[Spontaneous remission in histiocytosis X with lung and bone involvement].

Histiocytosis X is very rare in the adult. Since the illness is frequently asymptomatic it often causes diagnostic and therapeutic problems. Up to the present, assessment of the long-term course in the adult has required individual case records. A uniform therapeutic concept does not exist. According to prevailing opinion, asymptomatic patients do not require therapy. Our case record describes the spontaneous course in a young asymptomatic patient in whom histiocytosis X, which had affected lungs and bones, healed within 16 months.