Dr. Robert John Greiner M.D.

Lymph nodes play an important role in filtering antigens from the extracellular fluid. They are ideal organs for accepting antigens that gain access through the skin and gastrointestinal tract. Lymph nodes are considered to have high concentrations of antigen-presenting cells and lymphocytes.The...

Non-Hodgkin lymphoma affects over 700,000 people in America alone. Though current treatments are moderately effective, especially for aggressive forms of the disease, more can be done to help people impacted by NHL. Researchers are doing just that by working to develop new, innovative treatment for...

Lymphoma is a blood cancer that affects both children and adults.Lymphoma begins its growth in the lymphatic white blood cells of the lymph system. This system is a major warrior in fighting off infections and diseases. It is part of the body’s immunity team.The lymph system loops throughout the...

Leukemia in its early stages may present no signs or symptoms, as these only appear when the leukemia cells have taken over a large number of normal blood cells. A person with leukemia is very lucky indeed if early-stage detection occurs incidentally, through a routine blood test or one done for...

IntroductionA decrease in the number of white blood cells (WBCs) is referred to as leukopenia. There are several causes for leukopenia. It may be due to certain drugs, cancer, radiation and chemotherapy for cancer, stem cell transplant, surgery, steroids, or autoimmune disorders. The immune system...

PurpuraPurpura refers to purple-colored spots that are usually seen on the skin, including mucous membranes and other organs. It is also called skin hemorrhages or blood spots.Purpura is usually recognized when there is pooling of blood under the skin due to ruptured small blood vessels. The size of...