What is Lymphadenitis?
Definition Lymphadenitis is the inflammation of a lymph node. It is often a complication of a bacterial infection of a wound, although it can also be caused by viruses or other disease agents. Lymphadenitis may be either generalized, involving a number of lymph nodes; or limited to a few nodes in the area of a localized infection. Lymphadenitis is sometimes accompanied by lymphangitis, which is the inflammation of the lymphatic vessels that connect the lymph nodes. Description Lymphadenitis is marked by swollen lymph nodes that are painful, in most cases, when the doctor touches them. If the lymphadenitis is related to an infected wound, the skin over the nodes may be red and warm to the touch. If the lymphatic vessels are also infected, there will be red streaks extending from the wound in the direction of the lymph nodes. In most cases, the infectious organisms are hemolytic Streptococci or Staphylococci. Hemolytic means that the bacteria produce a toxin that destroys red blood cells
Lymphadenitis is swelling in the lymph nodes. It usually presents as one or more enlarged or swollen lymph nodes under the neck, in the armpits, or in the groin. Lymphadenitis is relatively common, and most often indicates presence of bacterial or viral infection. Fungal and parasitic infection can also result in lymphadenitis. Very occasionally, a lymph node may also be swollen as a result of cancerous cells invading the node. This is less common but may be tested if all other symptoms are ruled out. The most common symptoms of lymphadenitis are swelling of one or more lymph nodes. Lymph nodes that are swollen may feel slightly hardened, and may be painful when touched. The skin covering the lymph node can sometimes feel hot to the touch or may appear slightly red. A swollen lymph node usually means a doctor will want to look for the cause, especially if lymphadenitis is painful. Physicians may perform blood tests to screen for infections, and in some cases, may perform a small biopsy
