Hematochezia vs. melena: What’s the difference?
Hematochezia and melena are two terms that describe different ways blood can appear in your stool.
Hematochezia is bright red blood that generally starts lower in the digestive tract. Melena generally starts much higher up in the digestive tract and results in black, tarry stools.Both melena and hematochezia can be signs of cancer somewhere along your gastrointestinal tract. But can they ever be a symptom of something...

Video producer’s storytelling supports MD Anderson’s mission to end cancer
Alex King came to MD Anderson after 20 years of working in TV production in Las Vegas. The work was fun, but it was a constant grind....
What is mucositis? 4 things to know about this cancer treatment side effect
Mucositis is a disruption in the mucosal lining of the gastrointestinal tract that causes inflammation. It is often accompanied by symptoms...
Prebiotics versus probiotics: What’s the difference?
Prebiotics and probiotics sound similar, but these nutrients benefit your gut health in different ways.
Here, I answer common prebiotic and probiotic questions I hear as a research dietitian, like the differences between the two, their health benefits and foods where they are found.
How are probiotics and prebiotics different?Prebiotic foods contain non-digestible components that microorganisms in your gut can break down...

4 questions with immunology researcher Susan Bullman
Susan Bullman, Ph.D., has studied bacteria and how it contributes to cancer for decades. Her research led her from her home in Ireland and...