Agenesis of the corpus callosum (ACC) is complete or partial absence of the structure that connects the two hemispheres of the brain - the corpus callosum, which is the largest fibre tract in the central nervous system.It can occur as an isolated condition or in combination with other cerebral abnormalities. These include:
Image caption Isabel dos Santos is relatively shy despite her successful business career. Isabel dos Santos, the eldest daughter of Angola's president, has become Africa's first female billionaire, US financial magazine Forbes has said. The 40 year old's shares in several Portuguese firms, including a TV cable company, and an Angolan bank put her on the billionaires' list, Forbes said. Her first venture was a restaurant in Luanda called Miami Beach, said the magazine that tracks the world's rich. Most of the population in oil-rich Angola live on about $2 (Â£1.25) a day.
In 1975, Bath became the first African-American woman surgeon at the UCLA Medical Center and the first woman to be on the faculty of the UCLA Jules Stein Eye Institute. She is the founder and first president of the American Institute for the Prevention of Blindness. Patricia Bath was elected to Hunter College Hall of Fame in 1988 and elected as Howard University Pioneer in Academic Medicine in 1993.