- Etiology: abnormal proliferation of Langerhans cells
- Radiograph: distribution in flat bones and long bones, well circumscribed lytic lesions with beveled edges with +/- periosteal reaction and with +/- sclerotic rim, can involve floating teeth, vertebra plana in spine with soft tissue paravertebral mass
- MR: lesions filled with soft tissue without large mass, often homogeneously bright / enhancing, +/- marrow edema >> soft tissue edema
- Clinical: Bone scan or skeletal survey to assess for / monitor distant lesions
Radiology Cases of Langerhans Cell Histiocytosis

