Langerhans cell histiocytosis (LCH) is a rare histiocytic tumour in adult. We report a case of LCH involving skull bones in a 35year old lady who presented with fever. headache and diabetes insipidus since two years. Radiological examination revealed osteolytic lesions in the parietal and occipital bones along with a solid. https://www.divivoyance.com/product-category/scientific-lab-bottles/