Which physical findings are characteristic of chronic unifocal Langerhans cell histiocytosis (LCH)?

Updated: Jun 12, 2020
  • Author: Christopher R Shea, MD; Chief Editor: William D James, MD  more...
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Chronic unifocal LCH (eosinophilic granuloma of bone) classically presents as a solitary calvarial lesion in young adults; other frequent sites of involvement include vertebra, rib, mandible, femur, ilium, and scapula.

Lesions are usually asymptomatic, but bone pain and a soft tissue mass may occur. When calvarial lesions extend into the nervous system, a variety of neurologic manifestations may be seen. Bony lesions may cause otitis media by destruction of the temporal and mastoid bones, proptosis secondary to orbital masses, loose teeth from infiltration of the mandibles, or pituitary dysfunction due to involvement of the sella turcica.

Spontaneous fractures can result from osteolytic lesions of the long bones; vertebral collapse with spinal cord compression has been described. Mono-ostotic lesions of LCH may also appear in less common sites, such as the scapula. [43]

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