**Question:** Extensive Ileal resection can cause all the following EXCEPT:

A. Protein-losing enteropathy
B. Electrolyte imbalances
C. Bacterial translocation
D. Vitamin B12 deficiency

**Core Concept:** Extensive Ileal resection can lead to malabsorption due to the loss of segments involved in the absorption of specific nutrients, electrolytes, and vitamins.

**Why the Correct Answer is Right:** Vitamin B12 is absorbed in the terminal ileum, which is the region that is typically resected in extensive ileal resection. As a result, vitamin B12 deficiency is the correct answer, as it is the specific nutrient that would be affected by such a resection.

**Why Each Wrong Option is Incorrect:**

A. Protein-losing enteropathy: This term refers to a condition where protein is lost from the GI tract, often caused by enteric damage. While extensive ileal resection can cause protein loss, the question specifies that this is NOT a consequence of the resection.

B. Electrolyte imbalances: Electrolyte imbalances can occur due to malabsorption of specific electrolytes in extensive ileal resection, but the question states that this is NOT a consequence of the resection.

C. Bacterial translocation: This refers to the movement of bacteria and its products from the gut into the bloodstream, often seen in conditions like necrotizing enterocolitis or intra-abdominal infections. The question specifies that this is NOT a consequence of extensive ileal resection.

**Clinical Pearl:** When planning extensive ileal resection, it is essential to consider the potential consequences of malabsorption on electrolytes, nutrients, and vitamin levels. Postoperative nutritional support and monitoring are crucial to minimize complications and aid in recovery.

**Correct Answer:** Vitamin B12 deficiency