Esophageal Diagnostics

Barrett’s
Esophagus.

Identifies genetic abnormalities in patients with Barrett’s esophagus and surfaces indication of progression that may require additional procedures or targeted management.

Cytology, immunohistochemistry (IHC), and fluorescence in situ hybridization (FISH) on brushings — distinguishing patient chromosomal alterations with high sensitivity and specificity for level of dysplasia and adenocarcinoma.

How the test works

Three modalities,
one chromosomal picture.

Cyto+IHC
cytology · immunohistochemistry

Indication

For at-risk esophageal adenocarcinoma patients, or patients who already have a Barrett’s esophagus diagnosis and need risk-stratification.

Risk stratification

Distinguishes low-grade from high-grade dysplasia to inform management.

1
specimen type

Sample method — esophageal brushing

Brushing specimen in a ThinPrep PreservCyt vial (used for both FISH and IHC). Transport at room temperature in the brushing transport kit.

Single sample, multiple modalities

One brushing supports cytology, IHC, and the four-probe FISH panel.

Clinical Utility

A panel of biomarkers built around dysplasia.

Each marker has a known association with dysplastic changes in Barrett’s esophagus — combined to support patient-specific decisions.

AMACR (P504S)

Concentration and activity recently identified as a useful biomarker for dysplasia in ulcerative colitis, Crohn’s disease, and Barrett’s esophagus.

p53

IHC of p53 expression is of interest in Barrett’s patients with a diagnosis of indefinite for dysplasia or low-grade dysplasia.

Ki-67

IHC staining for MIB-1, the Ki-67 proliferation antigen — the staining pattern appears gradually with disease progression.

ABPH 2.5

Stains the acidic mucin present in goblet cells — supports the cytological assessment of intestinal metaplasia.

Feulgen Stain

Quantifies chromosomal material / DNA with sufficient resolution to detect the gain or loss of a single large chromosome.

Cytology

Imparts a characteristic range of coloration to exfoliative cells, allowing critical examination of nuclei and cytoplasmic components.

Frequently Asked Questions

Everything your team typically asks.

Who is this test indicated for?

At-risk esophageal adenocarcinoma patients, or patients who already have a Barrett’s esophagus diagnosis and need risk-stratification by level of dysplasia.

What sample is required?

An esophageal brushing specimen, collected into a ThinPrep PreservCyt vial. The same specimen is used for both FISH and IHC. Transport at room temperature in the brushing transport kit.

Which FISH probes are included in the panel?

The Barrett’s FISH panel uses a four-probe set targeting:

  • MYC — 8q24
  • p16CDKN2A at 9p21
  • HER2ERBB2 at 17q12
  • ZNF217 — 20q13

How are FISH results interpreted alongside histology?

When FISH results are concordant with histology, they confirm the diagnosis. When they differ, the discrepancy suggests further investigation. Positive FISH results combined with concordant morphology support aggressive treatment decisions.

Where can I find related publications?

See additional clinical resources and peer-reviewed publications from Pathnostics.

View Clinical Resources →

Request more information about Barrett’s Esophagus testing.

Connect with a representative to learn how the panel can support stratification and management decisions for your patients.