Histopathological findings on hard palate biopsy showing diffuse chorion infiltration by a poorly differentiated carcinoma with a focal microglandular growth pattern (hematoxylin and eosin stain, ×400)

<p><b>Copyright information:</b></p><p>Taken from "Oral ulcer as an exclusive sign of gastric cancer: report of a rare case"</p><p>BMC Cancer 2005;5():117-117.</p><p>Published online 19 Sep 2005</p><p>PMCID:PMC1242220.</p><p>Copyright © 2005 Colombo et al; licensee BioMed Central Ltd.</p

Gastric biopsies revealed an undifferentiated signet-ring cell gastric carcinoma (hematoxylin and eosin stain, ×400)

<p><b>Copyright information:</b></p><p>Taken from "Oral ulcer as an exclusive sign of gastric cancer: report of a rare case"</p><p>BMC Cancer 2005;5():117-117.</p><p>Published online 19 Sep 2005</p><p>PMCID:PMC1242220.</p><p>Copyright © 2005 Colombo et al; licensee BioMed Central Ltd.</p> Note the characteristic distribution of blue intracytoplasmic mucines in the neoplastic cells (inset) (Alcian-Pas stain, ×400)