Fig. 18From: Skeletal involvement in Langerhans cell histiocytosisa Anteroposterior radiograph of the pelvis reveals bilateral lytic lesions of the iliac wings. On the left, well-defined sclerotic margins are seen around the lesion that extends to the supra-acetabular region. b On axial CT scan, note the presence of a fragment of intact bone within the left bone lesion (arrow) with reactive sclerosisBack to article page