Lymphoid hyperplasia

Lymphoid hypertrophy

Lymphoid hyperplasia is an increase in the number of normal cells contained in the lymph nodes. These cells are called lymphocytes. This can occur as a reaction to infection with bacteria, viruses, or other types of germs. This may or may not be normal, depending on why it occurs.

Lymphatic system

The lymphatic system filters fluid from around cells. It is an important part of the immune system. When people refer to swollen glands in the neck, they are usually referring to swollen lymph nodes. Common areas where lymph nodes can be easily felt, especially if they are enlarged, are the groin, armpits (axilla), above the clavicle (supraclavicular), in the neck (cervical), and the back of the head just above hairline (occipital).