<prompt> Commonest cause of pyometraCarcinoma cervixCarcinoma endometriumVaginitisSenile endometritis  <response>: Ans. is b i.e. Carcinoma endometrium Pyometra is collection of pus or mixture of pus and blood within the uterus. Causes : Most common cause is Carcinoma endometriumdeg 2ld most common cause is Senile endometritts. Other causes : Congenital atresia of the vaginacervix Stenosis of cervixvagina following : - Operations - Burns - Radiotherapy Endometritis : - Senile - Tuberculous - Puerperal Carcinoma : Ca endometrium most common Ca cervix Ca corporis 