Immunohistochemical analyses of NKX2.1 expression in resection specimens of primary gastric carcinoma.

<p>(<b>A</b>) Strong NKX2.1 staining was observed in noncancerous gastric mucosa glands. (<b>B</b>) Immunostaining of the well-differentiated gastric cancer cells. (<b>C</b>) Weak NKX2.1 staining in poorly-differentiated gastric adenocarcinoma. (<b>D</b>) NKX2.1-negative gastric adenocarcinoma. Original magnification for A–D, ×200.