There are around 600 lymph nodes located throughout the body, many of which are clustered in the armpit, groin, and neck. They vary in size from a few millimeters to up to 1.5 centimeters in diameter.

These lymph modes are located in front of your ears, and can become swollen if you have an infection in your head or neck.

N1 Single lymph node metastasis, 2 cm or less in greatest dimension N1 Single regional lymph node metastasis in the true pelvis (hypogastric, obturator, external iliac or presacral lymph node ...