Which vitamin deficiency commonly occurs in short bowel syndrome?
**Question:** Which vitamin deficiency commonly occurs in short bowel syndrome?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
**Core Concept:** Short bowel syndrome (SBS) is a condition characterized by severe loss of small bowel, which is responsible for absorbing essential nutrients, including vitamins. This leads to malabsorption of vitamins and can result in deficiencies.
**Why the Correct Answer is Right:** Vitamin D deficiency is the correct answer because it is primarily absorbed in the terminal ileum and colon, which are lost in SBS. Inadequate vitamin D absorption leads to secondary hyperparathyroidism, causing increased calcium absorption from bone and resulting in osteopenia or osteoporosis.
**Why Each Wrong Option is Incorrect:**
A. Vitamin A deficiency is not as common in SBS because it is absorbed in the small intestine's proximal segments, which are typically preserved in SBS patients.
B. Vitamin D deficiency is the correct answer, not vitamin D itself. Vitamin D is responsible for calcium absorption, but the question refers to the deficiency, which occurs due to impaired absorption in SBS.
C. Vitamin E deficiency is less likely in SBS compared to vitamin D deficiency because vitamin E is absorbed in the small intestine, specifically in the ileum.
D. Vitamin K deficiency is less common in SBS because it is absorbed in the terminal ileum and colon, regions typically affected in SBS.
**Clinical Pearl:** In patients with SBS, maintaining adequate vitamin D levels is crucial for calcium and bone health. This highlights the importance of considering a comprehensive nutritional plan, including vitamin D supplementation, to prevent complications like osteoporosis and rickets in these patients.