Eosinophilic granuloma

MONDO:0020517

A clinical variant of Langerhans cell histiocytosis characterized by unifocal involvement of a bone (most often), skin, or lung. Patients are usually older children or adults usually presenting with a lytic bone lesion. The etiology is unknown. Morphologically, eosinophilic granuloma is characterized by the presence of Langerhans cells in a characteristic milieu which includes histiocytes, eosinophils, neutrophils, and small, mature lymphocytes.

Also known as: Monostotic Langerhans cell histiocytosis, chronic and localised Langerhans cell histiocytosis, chronic and localized Langerhans cell histiocytosis, chronic unifocal Langerhans cell histiocytosis, eosinophilic granuloma, eosinophilic xanthomatous granuloma, unifocal Langerhans cell histiocytosis

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