Colonoscopy and sigmoidoscopy are very similar investigations. Sigmoidoscopy allows visualisation of only the distal part of the colon while colonoscopy allows visualisation of the entire large bowel and the distal small bowel, as well. Both investigations involve passing a camera through the anus.
Anencephaly is a birth defect due to unknown causes in most situations. However, research shows that a deficiency of folic acid during early pregnancy can play a role in neural tube development. In addition, a family history of anencephaly increases the probability of the birth defect.o research the causes of Anencephaly, consider researching the causes of these these diseases that may be similar, or associated with Anencephaly: 1  Neural tube defect. 2  NTD. 3  Neural tube defect spectrum. 4  Absent cerebellum. 5  Absent cerebrum.
Encephalitis can occur with certain childhood viral illnesses, such as mumps, measles, varicella (chicken pox), rubella (German measles), or mononucleosis. A much more serious type of encephalitis is caused by the herpes simplex virus * (HSV).HSV rarely infects the brain, but when it does, it can be life threatening. West Nile virus, which first arrived in the United States from other parts of the world in the late 1990s, can cause encephalitis as well.here are several different causes of encephalitis. The most common is infection, usually by a virus. The condition can range from mild to severe, depending on the type of germ producing the infection.