Immunostaining for FLT1, HES1 and NR4A2 in pulmonary mucoepidermoid carcinomas (400×).

<p><i>A–C</i>, Immnostaining for FLT1 in low (<i>A</i>), intermediate (<i>B</i>) and high (<i>C</i>) grades of tumors. <i>D–F</i>, Immnostaining for HES1 in low (<i>D</i>), intermediate (<i>E</i>) and high (<i>F</i>) grade tumors. <i>G–I</i>, Immnostaining for NR4A2 in low (<i>G</i>), intermediate (<i>H</i>) and high (<i>I</i>) grade tumors.