<prompt> Answer this question truthfullyWhat does the term hydrarthrosis mean in intermittent conditions?  <response>: <reason> The pathogenesis of Intermittent hydrarthrosis is unknown. An involvement of mastocytes has been reported.Recently, heterozygous disease-associated mutations of the Mediterranean fever gene MEFV gene , which encodes the pyrinmarenostrin protein, were identified in patients with intermittent hydrarthrosis but without other features of familial Mediterranean fever. 