Thoracic vertebrae attachment Single bone eosinophilic granuloma is a rare type of Langerhans cell histiocytosis. A 17-year-old thoracic spine with a single bone eosinophilic granuloma was treated in our hospital with lesion removal and interlaminar fusion. Increased understanding of clinical features, etiology, diagnosis and treatment of bone eosinophilic granuloma through literature review