"admixture of blood in the stool" . "defecating blood" . "rectal bleeding" . . . "D006471" . . . "blood is present in the stool" . . . "bright red blood per rectum" . . "blood in the stool" . . "Rectal bleeding" . "bloody stool" . "19317" . . "Hematochezia" . . . . . "fresh red blood rectally" . "hematochezia" . "Hematochezia" . "fresh blood in the stool" . "bloody feces" . . "bloody bowel movements" . . . . . "frank blood in the stools" . . "578.1" .