Definition
An esophageal smear involves collecting cells from the lining of the esophagus and examining them under a microscope. This is typically done during an endoscopy, where a thin tube with a camera is inserted into the esophagus. The procedure aims to detect abnormalities such as Barrett's esophagus or esophageal cancer. The collected cells are smeared onto a slide and stained. This allows pathologists to analyze the cells for any signs of disease. Early detection is key to treatment.