CSF CEACAM6 could be detected in 34/40 LM (median value of 2.130 ng/ml with IQR of 0.633–3.088 ng/ml) and 14/44 controls (median value of 0.039 ng/ml with IQR of 0.024–0.600 ng/ml). This evidence concerns the gene CEACAM6 and lymphangioma.