What is required for the formal diagnosis of celiac disease?

What is required for the formal diagnosis of celiac disease?

• A. Intestinal biopsy
• B. Serology alone
• C. Gluten-free diet trial
• D. Diet history

Answer: (A)

A definitive diagnosis of celiac disease requires tissue confirmation from the small intestine. An upper endoscopy with duodenal biopsies is used to look for the characteristic histologic changes—villous atrophy or flattening, crypt hyperplasia, and increased intraepithelial lymphocytes. This histologic evidence, typically alongside positive celiac-specific serology, provides the confirmatory proof needed for diagnosis. Serology serves as an important screening tool but cannot by itself establish the diagnosis because results can be misleading or falsely negative in some cases. A gluten-free diet trial may improve symptoms but does not prove that celiac disease is the cause, and a detailed diet history likewise cannot confirm the disease. Therefore, intestinal biopsy is required for formal diagnosis.

A definitive diagnosis of celiac disease requires tissue confirmation from the small intestine. An upper endoscopy with duodenal biopsies is used to look for the characteristic histologic changes—villous atrophy or flattening, crypt hyperplasia, and increased intraepithelial lymphocytes. This histologic evidence, typically alongside positive celiac-specific serology, provides the confirmatory proof needed for diagnosis. Serology serves as an important screening tool but cannot by itself establish the diagnosis because results can be misleading or falsely negative in some cases. A gluten-free diet trial may improve symptoms but does not prove that celiac disease is the cause, and a detailed diet history likewise cannot confirm the disease. Therefore, intestinal biopsy is required for formal diagnosis.