Alcian Blue-PAS - GI Pathology Applications

Combined mucin stain (Alcian blue pH 2.5 + PAS) differentiates adenocarcinoma subtypes across colorectal and gastric biopsy interpretation.

Pathology laboratories identify intestinal metaplasia through blue-magenta mucin contrast. Combined staining prevents signet-ring cell underdiagnosis.

Quality control verifies pH 2.5 carboxylation, PAS compatibility, and mucin specificity. Sequential staining prevents color bleeding artifacts.