Amyotrophic lateral sclerosis (ALS), sometimes called Lou Gehrig's disease, is a rapidly progressive, invariably fatal neurological disease that attacks the nerve cells (neurons) responsible for controlling voluntary muscles.
The Alpine Scheitholt furnishes an example of this older type of European zither. By the late 18th century, two principal varieties of European concert zither had developed, known as the Salzburg zither (with a rounded side away from the player), and the Mittenwald zither (with both sides rounded).
Types of Colon Polyps. The four most common types of colon polyps are inflammatory, adenomatous (adenoma), hyperplastic and villous (tubulovillous) adenoma. In addition to these, two less common polyp types include lymphoid, which are considered rare and benign (noncancerous) and juvenile.