Figure 2From: Oral ulcer as an exclusive sign of gastric cancer: report of a rare caseGastric biopsies revealed an undifferentiated signet-ring cell gastric carcinoma (hematoxylin and eosin stain, ×400). Note the characteristic distribution of blue intracytoplasmic mucines in the neoplastic cells (inset) (Alcian-Pas stain, ×400).Back to article page