<prompt> Diagnostic feature of RHD is :McCallam patchAschoff nodulesShaggy vegetationsBread butter pericarditis  <response>: Ans. is b i.e. Aschoff nodules Aschoff nodules are focal inflammatory lesions found in any of the three Layers of the heart. They are characteristic of acute rheumatic fever.Aschoff nodules consist ofFibrinoid necrosisAschoff giant cells HistiocytesPlasma cellsLymphocytesFibroblastCollagen 