Hypertrophic Osteoarthropathy, Primary, Autosomal Recessive, 2, also known as phoar2, is related to hypertrophic osteoarthropathy, primary, autosomal recessive, 1, and has symptoms including arthralgia An important gene associated with Hypertrophic Osteoarthropathy, Primary, Autosomal Recessive, 2 is SLCO2A1 (Solute Carrier Organic Anion Transporter Family Member 2A1). Affiliated tissues include skin and heart, and related phenotypes are secretory diarrhea and acne