A 42-year-old male is admitted to the hospital with chronic inflammation of the intestinal walls resulting in diarrhea, constipation, and melena. Which of the following conditions does the patient have?

Crohn's disease

http://www.google.com/#q=+chronic+inflammation+of+the+intestinal+walls+

To determine the condition that the patient has, we need to analyze the given information. Let's break down the given symptoms:

1. Chronic inflammation of the intestinal walls: This indicates long-term inflammation in the intestines.
2. Diarrhea: Frequent bowel movements, often loose or watery in nature.
3. Constipation: Difficulty passing stools or infrequent bowel movements.
4. Melena: Dark, tarry stools due to the presence of digested blood.

Based on these symptoms, the condition that the patient likely has is Inflammatory Bowel Disease (IBD), specifically Crohn's disease. Crohn's disease is a chronic inflammatory condition that can affect any part of the digestive tract, including the intestines.

To get to this conclusion, we used our knowledge of medical conditions and their associated symptoms.