Which appendix pain is referred to suprapubic region with pain on internal rotation of hip
**Core Concept**
The question is testing the student's knowledge of referred pain patterns in appendicitis. Referred pain in appendicitis occurs due to irritation of the parietal peritoneum, which is innervated by the subphrenic nerve and the iliohypogastric nerve. The iliohypogastric nerve supplies the lower abdominal wall and also has afferent fibers that travel to the spinal cord with the femoral nerve, explaining the referred pain to the hip.
**Why the Correct Answer is Right**
The correct answer is related to the referred pain pattern in appendicitis, specifically when the inflamed appendix is located in the right lower quadrant. The pain is referred to the suprapubic region due to the convergence of visceral and somatic pain fibers. When the patient internally rotates their hip, the pain is exacerbated due to the stretching of the iliopsoas muscle, which is innervated by the femoral nerve. This stretching stimulates the afferent fibers that travel with the femoral nerve, resulting in increased pain in the suprapubic region.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because it does not explain the referred pain pattern in appendicitis. The pain in appendicitis is not typically referred to the suprapubic region.
**Option B:** This is incorrect because it does not accurately describe the referred pain pattern in appendicitis. The pain in appendicitis is not typically referred to the hip.
**Option D:** This is incorrect because it does not explain the referred pain pattern in appendicitis. The pain in appendicitis is not typically referred to the suprapubic region due to the stretching of the iliopsoas muscle.
**Clinical Pearl / High-Yield Fact**
A classic exam trap is to remember that referred pain in appendicitis can be misleading, and the pain may be referred to the suprapubic region, hip, or even the back. The key is to take a thorough history and perform a physical exam to confirm the diagnosis.
**Correct Answer:** C.