ENO2 and lymphangioma: We tested the levels and positive rates of carbohydrate antigen (CEA), carbohydrate antigen-125 (CA125), cytokeratin 19 fragments (CYFRA21-1) and neurone specific enolase (NSE) in CSF and serum, compared the sensitivity and specificity in the diagnosis of LM between different groups, and analyzed the correlation of detection between serum and CSF.