In a recent comprehensive review, Nakanishi et al. [155] listed 83 mutations in coding regions and 15 mutations in intronic regions of the human SLCO2A1 gene clinically associated with two human diseases: primary hypertrophic osteoarthropathy (PHO), which is also called pachydermoperiostosis (PDP), and chronic enteropathy, which is associated with SLCO2A1 (CEAS). The gene discussed is SLCO2A1; the disease is primary hypertrophic osteoarthropathy.