A Case of Eosinophilic Granuloma Presenting as Post-traumatic Scalp Hematoma

Abstract

Eosinophilic granuloma (EG) is a benign local bone disease . Here, we report a case of EG and describe the MRI findings which had progressed rapidly after minor head trauma. A 5-year-old healthy boy admitted to our clinic for a rapidly growing skull lesion. He had a minor head trauma history which occurred one month before admission. Computed tomography (CT) scan demonstrated a well defined lytic lesion on frontal bone. Our radiologic diagnosis was EG which was confirmed by the postoperative histopathologic diagnosis. Solitary EG lesions are a common form of Langerhans cell histiocytosis. Although the exact etiology of EG is not clear, autoimmune disorders, in-flammation are considered to be etiological factors. Also, minor trauma is considered in etiologic factors. We can suggest with the posttrau-matic radiological findings that the minor trauma may be a factor for initiation and aggravation on the pathways of development of EG.