Table 2 Comparison of high carbonic anhydrase IX (CA9) expression rates among histologic groups

Adenocarcinoma vs.

 Barrett esophagus

.0312

 Columnar cell metaplasia

.1683

 High-grade dysplasia

.6066

 Low-grade dysplasia

.4918

 Squamous cell carcinoma

< .0001^**

 Squamous epithelium

< .0001^**

Barrett esophagus vs.

 Columnar cell metaplasia

.3543

 High-grade dysplasia

.1241

 Low-grade dysplasia

.3706

 Squamous cell carcinoma

.0002^**

 Squamous epithelium

< .0001^**

Columnar cell metaplasia vs.

 High-grade dysplasia

.2684

 Low-grade dysplasia

.8167

 Squamous cell carcinoma

< .0001^**

 Squamous epithelium

< .0001^**

High-grade dysplasia vs.

 Low-grade dysplasia

.3894

 Squamous cell carcinoma

< .0001^**

 Squamous epithelium

< .0001^**

Low-grade dysplasia vs.

 Squamous cell carcinoma

<.0001^**

 Squamous epithelium

<.0001^**

Squamous cell carcinoma vs.

.4776

 Squamous epithelium

.4776