Dr. Mark A. Casillas M.D.

An anal fissure is a the tear or ulcer in the anal canal’s lining. The anal canal forms the end of the large bowel and lies between the rectum and the anus.Symptoms of Anal FissureThe following are the most prominent symptoms of anal fissures:...

What is colon cancer?Colon cancer is cancer of the large intestine, also known as the colon. If the last segment of the colon, the rectum, has a cancerous growth, it is known as rectal carcinoma. These two conditions are collectively referred to as colorectal cancer.Carcinoma of the colon is the...

What is an anal fissure?The anal canal is a short tube surrounded by muscle at the end of the rectum. An anal fissure is a small crack, tear, or rip in the anal canal lining. Anal fissure is often very small, but can cause you severe pain. The pain gets worse after passing stool and normally last...

Proctology, also known as colorectal surgery, is a field in medicine that focuses on the diagnosis and treatment of diseases or disorders of the colon, rectum, and anus. The one who specializes in proctology is called a proctologist or a colorectal surgeon. What is a proctologist?A proctologist is...

Also referred to as a VC, a virtual colonoscopy is an x-ray test that detects polyps, cancer or other disorders in the colon. Colonography is the medical term for this test.How It's DoneThere is a difference between an ordinary colonoscopy and a virtual colonoscopy. The ordinary colonoscopy uses a...

Colonoscopy is a procedure that evokes mixed reactions amongst most adults. Most people don't look forward to the preparation for a colonoscopy, much less the procedure itself. But improvements in the procedure in recent years have led to most people not having a terrible experience. It is of...