A 3-year-old girl was admitted to our hospital with diabetes insipidus and a left eye proptosis. During investigation of diabetes insipidus, an extensive osteolytic mass, involving skull base and maxillo-facial bones, was revealed. Biopsy exhibited dense infiltrate of foamy histiocytes, which were positive for CD68 and CD163 and negative for CD1a and S100 confirming histopathological diagnosis of Erdheim-Chester disease. Treatment with dabrafenib was initiated, with good response and no side effects.
- paediatric oncology
- head and neck cancer
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