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.
Nodes are generally considered to be normal if they are up to 1 cm in diameter; however, some authors suggest that inguinal nodes larger than 1.5 cm should be considered abnormal. It is not uncommon to have inguinal lymph node enlargement due to lower urinary tract infection (severe urethritis). A coincidentally enlarged lymph node due to other causes is possible too. It is important to follow lymph node size and number by serial physical examination regardless their apparent bengin cause.