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, inflammation are considered to be etiological factors. Also, minor trauma is considered in etiologic factors. We can suggest with the posttraumatic radiological findings that the minor trauma may be a factor for initiation and aggravation on the pathways of development of EG.