Stool for Fat Globulins

Function

The Stool for Fat Globulins test, often referred to as a qualitative fecal fat microscopic examination, is a primary screening tool used to detect the presence of undigested fat (neutral fats/triglycerides) in the stool. Under normal physiological conditions, the digestive system, specifically the pancreas and the small intestine, efficiently breaks down and absorbs dietary fats. When this process fails, fat is excreted in the feces, a condition known as steatorrhea.

Why it is Ordered

Physicians order this test when a patient presents with symptoms suggestive of malabsorption or maldigestion. These symptoms include chronic diarrhea, unexplained weight loss, abdominal cramping, and stools that are unusually foul-smelling, oily, or float in the toilet. It is a quick way to determine if the body is failing to process lipids correctly before proceeding to more invasive or time-consuming tests like the 72-hour quantitative fecal fat collection.

Associated Conditions

Several conditions can lead to an increase in fecal fat globulins:

• Exocrine Pancreatic Insufficiency (EPI): Common in cystic fibrosis or chronic pancreatitis, where the pancreas fails to produce enough lipase.
• Celiac Disease: An autoimmune reaction to gluten that damages the small intestinal lining, preventing nutrient absorption.
• Crohn's Disease: Inflammation of the digestive tract that interferes with normal absorption.
• Biliary Obstruction: If bile cannot reach the small intestine, fats cannot be emulsified for digestion.
• Small Intestinal Bacterial Overgrowth (SIBO): Bacteria can deconjugate bile salts, impairing fat uptake.