CCL18 and Gaucher disease: CCL18, also known as PARC (pulmonary activation-regulated chemokine), is a macrophage-derived chemokine that mainly attracts T-cells [13] and, precisely as chitotriosidase, shows considerably elevated levels in blood from patients with Gaucher's disease, hence serving as a suitable surrogate marker for lipid-laden macrophages in lysosomal storage disorders [14].