Other markers, including S-100, CD1a, glial fibrillary acidic protein (GFAP), oligo-2, CD21, CD23, CD35, CD30, CD20, Melan-A and HMB45, were all negative, which excluded Langerhans cell histocytisis (LCH), glioma, lymphoma, and follicular dendritic cell sarcoma, and so on. The gene discussed is GFAP; the disease is follicular dendritic cell sarcoma.