Langerhans cell histiocytosis

Discussion:

The diagnosis was between Langerhans cell histiocytosis (LCH) and Ewing sarcoma. Ewing sarcoma would be unusual in a child under 5 and biopsy confirmed LCH as the diagnosis.

Skeletal survey was performed to identify any additional lesions: there were none. This is solitary, single system LCH.

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