After amplification of the CD56– cells, reasonable amounts of MABs (based on ALP expression: 7.1 ± 6.3%, n = 5 TD; 12.4 ± 13.8%, n = 8 CP) and FAPs (based on PDGFRa expression: 8.3 ± 15.0%, n = 5 TD; 7.4 ± 5.7%, n = 8 CP) were isolated with no significant differences between CP and TD for both MABs (CD56– PDGFRa– ALP+) and FAPs (CD56– ALP– PDGFRa+; Figures 2C,D). The gene discussed is PDGFRA; the disease is thanatophoric dysplasia.