States of Matter: Facts. Matter is all around us. Matter is the air you are breathing. Matter is the computer you are reading from now. Matter is the stuff you touch and see. And it is more. Matter is defined as anything that has mass and takes up space.
The high specificity at 10 and 11 mmindicates that lymph nodes of this size are almostalways metastatic in this level.A study of level II lymph nodes shows that for thewhole population a minimum diameter of 8 mm givesa relatively high sensitivity and specificity of 81% and80%, respectively.
Because lymph nodes play an important part in fighting infections, in case of an infection they may swell. This may mean swelling of one or more lymph nodes. In children a node is considered enlarged if it is more than 1 centimeter (0.4 inch) in diameter.