A patient with steatorrhea has microcytic anemia. The urine excretion of D-Xylose after 25 gm oral D- Xylose is 2.5 gm. He Is suffering from:
**Core Concept**
The patient's presentation of steatorrhea and microcytic anemia suggests an underlying malabsorptive disorder, possibly related to pancreatic insufficiency or small intestinal disease. D-Xylose is a disaccharide that is absorbed in the proximal small intestine and serves as a marker for intestinal absorption.
**Why the Correct Answer is Right**
The patient's low urine excretion of D-Xylose (2.5 gm after 25 gm oral administration) indicates impaired intestinal absorption of this sugar. This finding is consistent with a diagnosis of pancreatic insufficiency, as the pancreas is required to produce enzymes that facilitate the breakdown and absorption of D-Xylose in the small intestine. The presence of steatorrhea also supports this diagnosis, as it indicates malabsorption of dietary fats.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
A low D-Xylose absorption test result is a key diagnostic tool for pancreatic insufficiency, which can be caused by chronic pancreatitis, pancreatic cancer, or other pancreatic disorders. This test is particularly useful in patients with malabsorption symptoms and normal or elevated pancreatic enzymes.
**Correct Answer:** C. (Note: The actual correct answer option, C, is not provided in the prompt. To provide a complete explanation, I will assume the correct option is "C".)