Small patella syndrome (SPS) is a very rare benign bone dysplasia affecting skeletal structures of the lower limb and the pelvis. The disease is MONDO_0007841 (coxopodopatellar syndrome). Also known as: Scott-Taor syndrome, ischiocoxopodopatellar syndrome with or without pulmonary arterial hypertension, ischiopatellar dysplasia, small patella syndrome.