title: Bilateral pneumothorax as an early sign in a child with histiocytosis X.
mesh_terms: D002675:Child, Preschool; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000175:diagnosis*; D006801:Humans; D008976:Molluscum Contagiosum / Q000175:diagnosis; D011030:Pneumothorax / Q000000981:diagnostic imaging*; D011859:Radiography; D013997:Time Factors