Diverticular disease is a condition that occurs when a person has problems that occur from small sacs that have formed and push outward through weak spots in the colon wall, according to National Institute of Diabetes and Digestive and Kidney Diseases. The descending colon is the colon's lower portion that travels down the left-hand side of the abdomen, and if it is thickening, this is likely due to inflammation.
Diverticulosis is when a person has diverticula (small sacs) that do not cause diverticulitis or diverticular bleeding, says Cleveland Clinic. Most people with this condition do not exhibit symptoms, but may have constipation or diarrhea. Diverticular disease implies any clinical state caused by diverticula, including hemorrhage and inflammation or their complications.
The colon is divided into four parts, states WebMD. The ascending colon travels up the right side of the abdomen, and the transverse colon runs across the abdomen. The descending colon travels down the left abdomen, and the sigmoid colon is a short curving of the colon just before the rectum. Muscles coat the colon wall, squeezing the feces along.
The descending colon is associated with several disorders including ulcerative colitis, Chron's disease, inflammatory bowel disease, and colon cancer, states WebMD. Symptoms and treatments of these diseases are varied.