HSPG2 and mastocytosis: Figure 6 shows that PLA2 activities (Figure 6(a)), DAGs (Figures 6(b) and 6(c)), AEA (Figure 6(d)), and PEA (Figure 6(e)) concentrations did not differ between patients with indolent and advanced variants but were altered in both indolent and advanced variants when compared to controls. PLC activity, like tryptase, was higher in patients with advanced mastocytosis compared to indolent variants (Figure 6(f)), but unlike tryptase, PLC activities were also increased in indolent mastocytosis compared to controls (Figure 6(g)).