All are true regarding superior Mesenteric Aery Syndrome, except –
**Core Concept**
Superior Mesenteric Artery (SMA) Syndrome is a rare clinical condition characterized by the compression of the third part of the duodenum between the abdominal aorta and the superior mesenteric artery. This compression leads to duodenal obstruction, often resulting in abdominal pain, nausea, vomiting, and weight loss.
**Why the Correct Answer is Right**
The correct answer is a statement that is true regarding SMA Syndrome. The condition typically occurs in individuals with a narrow angle between the aorta and the SMA, often due to a low-lying aortic arch or a retroperitoneal fibrosis. The compression of the duodenum leads to ischemia, which can cause damage to the duodenal mucosa and impair nutrient absorption.
**Why Each Wrong Option is Incorrect**
* **Option A:** This statement is incorrect because SMA Syndrome is not typically associated with a high-riding left renal vein. The condition is more closely related to the anatomical relationship between the aorta and the SMA.
* **Option B:** This statement is incorrect because SMA Syndrome can occur in individuals of any age, but it is more commonly seen in young women with a low body mass index (BMI). The condition is not limited to a specific age group or demographic.
* **Option C:** This statement is incorrect because SMA Syndrome is not a result of pancreatic cancer. While pancreatic cancer can cause duodenal obstruction, SMA Syndrome is a distinct clinical entity that is caused by the compression of the duodenum between the aorta and the SMA.
* **Option D:** This statement is incorrect because SMA Syndrome is not typically associated with a high-riding right renal vein. The condition is more closely related to the anatomical relationship between the aorta and the SMA.
**Clinical Pearl / High-Yield Fact**
SMA Syndrome is often associated with weight loss, abdominal pain, and nausea. However, the condition can also present with non-specific symptoms such as fatigue, weakness, and diarrhea. A high index of suspicion is necessary for diagnosis, as the symptoms can be similar to those of other gastrointestinal disorders.
**Correct Answer:** C.