Where the cancer starts is called the primary tumour. Some types of cancer, called leukaemia, start from blood cells. They don't form solid tumours. Instead, the cancer cells build up in the blood and sometimes the bone marrow. For a cancer to start, certain changes take place within the genes of a cell or a group of cells.
pommel horse. n. 1. A piece of gymnastic equipment that consists of a padded, loaf-shaped object with two pommels on top and stands horizontal to the floor, usually on adjustable legs. 2. An athletic event in which the pommel horse is used.
Laminitis is a disease that causes lameness in horses. It was once associated primarily with overweight ponies, but it can affect any age or size of horse. 1  With this disease, the laminae weaken, which attach the pedal bone to the inside of the hoof. 2  The horses pedal bone detaches from the inside of the hoof.