Concurrent Echinococcus Disease with Colorectal Carcinoma: Reports of Two Cases

Colorectal cancer (CRC) is currently the most common malignity of the gastrointestinal (GI) system in the world. CRC is the third most frequently diagnosed cancer in the U.S.A and it ranks third in cancer-related causes of death. Its etiology is complex, involving both environmental and genetic factors. Hydatid disease is an endemic disease, especially in eastern countries. E. granulosus and E. multilocularis are the most frequent types responsible for hydatidosis in human beings. Echinococcus larvae develop in cystic form, mostly in the liver or lungs. We presented two cases of rectum cancer who had co-existing liver echinococcus.