Dr. Robert J Zahn MD

Bronchial tubes are the airways through which air travels and reaches the lungs. The inflammation of these bronchial tubes is called bronchitis. The inflammation is more often caused by a viral infection, smoke, dust, or other irritants.Bronchitis may be due to a chest infection, inflammation of...

Rare are the men who have never questioned the size of their penis. Is my penis too small? Is my penis too big? These questions are placed on the list of the most common Google searches. Urologists also confirm that these are the usual concerns their patients express. What is it about penis size,...

IntroductionCat scratch fever or cat scratch disease is a bacterial infection spread by cats. You can get the cat scratch fever from a scratch or bite of a cat that is infected with the bacterium called Bartonella henselae. Aside from the infected cat’s scratch, you can also acquire the infection...

What is irritable bowel syndrome (IBS)?Irritable bowel syndrome (IBS) is a common gut disorder. Irritable bowel syndrome (IBS) is unlike inflammatory bowel disease and differs from other bowel conditions. It is a group of several symptoms such as abdominal pain, bloating, cramping, constipation,...

The ABO (A, B, AB, or O) blood group system is used to classify different types of antibodies in the plasma and antigens in the red blood cells (RBCs). The ABO blood group and RhD antigen determine the type of blood that is a perfect match for blood transfusions. The four ABO blood groups are: ...

Yes. Arthritis is one of the major causes of back pain and can cause long-term effects in an individual. Back pain is a common problem which affects 4 out of 5 of us at some point. Back pain is a type of pain experienced mostly through the spine. Back pain can last for a short time, but there are...