MedGen

Presence of a protracted or persistent infection by a pathogen potentially related to an underlying abnormality of the immune system that is not able to clear the infection. [from HPO]

Without clinical signs or indications that raise the possibility of a particular disorder or dysfunction. [from NCI]

An adenocarcinoma arising from the rectum. It is more frequently seen in populations with a Western type diet and in patients with a history of chronic inflammatory bowel disease. Signs and symptoms include intestinal bleeding, anemia, and change in bowel habits. According to the degree of cellular differentiation, rectal adenocarcinomas are divided into well, moderately, and poorly differentiated. Histologic variants include mucinous adenocarcinoma, signet ring cell carcinoma, medullary carcinoma, serrated adenocarcinoma, cribriform comedo-type adenocarcinoma, and micropapillary adenocarcinoma. [from NCI]

Babesiosis is an infectious disease caused by protozoa of the genus <i>Babesia</i> and characterized by a febrile illness and hemolytic anemia but with manifestations ranging from an asymptomatic infection to a fulminating illness that can result in death. [from ORDO]

A reduction in erythrocytes volume or hemoglobin concentration. [from HPO]