John Douglas Gleason M.D.

You might be considering having a colonoscopy. A colonoscopy is a diagnostic procedure used to see the inside of your rectum and colon. Doctors recommend a regular colonoscopy to screen individuals for colorectal cancer.Recent 2008 guidelines state that men and women over fifty years old should have...

What is an Erection Self-Test?An erection self-test is a test performed by a man to determine the presence and/or severity of erectile problems. This test is also called the NPT (Nocturnal Penile Tumescence) stamp test. Before having the test, it is important to ensure that you have not had alcohol...

What is the main function of the liver?The liver serves as one of the most useful organs in the human body. It carries out many important functions that help sustain life and keep balance within the body. The liver does the following functions:...

What Is Diabetes?Diabetes is a serious chronic illness that could affect 552 million people by the year 2030, according to the International Diabetes Federation (IDF). A person suffering from diabetes is at a much greater risk of heart attack, kidney damage, or stroke. Therefore, we are now putting...

Parkinson's is a degenerative central nervous system disorder that affects an estimated 1 million people in the U. S. alone according to the National Parkinson Foundation. Despite recent efforts, the disease remains to be a mystery to the medical world with no known cure and no known accurate...

There is probably nothing tougher than being a single parent. Parenthood is a difficult journey even when you have a partner to help you with the house chores, pay the bills, and take care of the children. Being able to handle all of these responsibilities is already admirable. But, there are some...