Freebase(0.00 / 0 votes)Rate this definition: Arbol is a programming language which has been primarily developed for use in Genetic Programming experiments. It is a functional programming language inspired by the ideas of other small and esoteric languages.
Causes. In most cases of colon or rectal cancers, the cause or causes are unknown. Defects in genes that normally protect against cancer play the major role in causing polyp cells to continuously change and become cancerous.
Your doctor will inject a germ called Bacillus Calmette-Guerin (BCG) into your bladder through a catheter. This germ is related to the one that causes tuberculosis. This draws your bodyâs immune cells to your bladder. There, theyâre activated by the BCG and begin to fight the cancer cells.