PCLAF and thanatophoric dysplasia: In the present study, we determined in a TD patient the specific activities of PAF anabolic enzymes (PAF-CPT and Lyso-PAF-AT) in platelets and leukocytes as well as the specific activity of the catabolic enzyme PAF-AH in the same set of cells and erythrocytes along with the activity of Lp-PLA2 in plasma.