Showing posts with label lymph nodes. Show all posts
Showing posts with label lymph nodes. Show all posts

Friday, November 18, 2011

What is Lymphadenitis ?

Lymphadenitis is the inflammation of one or several lymph nodes.


CAUSE
Lymphadenitis may be caused by infections from various organisms, namely bacteria, viruses, protozoan, rickettsial, or fungal. In particular, the infection spreads to the lymph nodes of skin infections, ear, nose or eyes.


SYMPTOMS
Lymph nodes are infected will usually palpable enlarged and tender and painful. Sometimes the skin above it looks red and warm.


Diagnosis
Diagnosis based on symptoms. To help determine the cause, can do a biopsy (removal of tissue for examination under a microscope).


TREATMENT
Treatment depends on the causative organism. For bacterial infection, antibiotics are usually given by mouth (orally) or intravenously (through veins).

To help reduce the pain, the affected lymph nodes can be compressed warm. Usually if the infection has been treated, the glands will shrink slowly and the pain will disappear. Sometimes the enlarged glands remain hard and no longer feels soft to the touch.


PREVENTION
Maintaining health and hygiene can help prevent body infections.

Saturday, November 5, 2011

What is Leukemia ?

Leukemia is a cancer of blood cells.

CAUSE
Leukemia usually affects white blood cells. The cause of most types of leukemia is unknown. Viruses cause some leukemias in animals (eg cats).

HTLV-I virus (human T-cell lymphotropic virus type I), which resemble the virus that causes AIDS, is thought to cause a rare type of leukemia in humans, namely adult T-cell leukemia.

Exposure to radiation (radiation) and certain chemicals (eg benzene) and the use of anticancer drugs, increasing the risk of leukemia. People who have certain genetic disorders (eg Down's syndrome and Fanconi syndrome), are also more susceptible to leukemia.

White blood cells derived from stem cells in bone marrow. Leukemia occurs when the process of maturation of stem cells into white blood cells susceptible to interference and produces changes toward malignancy.

These changes often involve a rearrangement of parts of chromosomes (genetic material of cells is complex). Chromosomal rearrangement (translocation chromosomes) disrupt the normal control of cell division, so that cells divide uncontrollably and become malignant, eventually mastering these cells replace the bone marrow and the place of the cells that produce blood cells are normal. This cancer can also infiltrate into other organs, including liver, spleen, lymph nodes, kidney, and brain.