In the small bowel, 30 to 40% of bleeding is caused by abnormal blood vessels in the wall of the small bowel. These abnormal blood vessels have many names, including angioectasias, angiodysplasias, or arteriovenous malformations (AVMs).he small bowel (or small intestine) is the longest portion of the gastrointestinal (GI) tract. It is called small because it is thin or narrow compared with the large bowel (also known as the colon), but it is much longer than the large bowel (14 feet on average).
Don't forget the multiple causes of an elevated d-dimer: 1  PE/DVT. 2  Sepsis/infection. 3  Malignancy. 4  Renal disease. 5  Pregnancy. 6  MI. 7  Stroke.
Prolactinoma - What else can cause elevated prolactin levels? There are a few conditions other than prolactinomas that may be associated with hyperprolactinemia. As prolactin is regulated by dopamine , medications that interfere with this substance in the brain can cause elevated prolactin levels. Drugs prescribed for psychiatric and gastrointestinal disorders may raise prolactin levels to greater than 200 ng/ ml.