Hydrarthrosis is related to cartilage disease and intermittent hydrarthrosis, and has symptoms including arthralgia, edema and metatarsalgia. An important gene associated with Hydrarthrosis is MEFV (MEFV Innate Immunity Regulator, Pyrin), and among its related pathways/superpathways are Nanog in Mammalian ESC Pluripotency and Transport of inorganic cations/anions and amino acids/oligopeptides. Affiliated tissues include bone and spinal cord, and related phenotype is skeleton.