Clinical Services

Gastrointestinal Pathology

BioVantra offers an extensive array of anatomic pathology and molecular-based testing services specifically designed to provide gastroenterologists with information to better manage cancer and other chronic diseases. We understand the importance of accurate, timely diagnostic test results and actionable healthcare information. Our commitment to these values helps ensure superior patient care and increased client satisfaction.

The following highlights our gastrointestinal pathology test offerings:


  • Esophagus, stomach, small bowel, large bowel, and liver biopsy
  • Microwave tissue processing to minimize disruption of cellular architecture
  • Special stains (Group I - Microorganisms; Group II - Cellular structures)
    • Alcian blue/PAS stains on esophageal, gastric, and duodenal biopsies
    • Comprehensive staining panel for liver biopsies
  • Immunohistochemistry
    • CD117 and H. pylori
  • Consultation and 2nd opinion


  • Exfoliated (Brushings, lavages and fluids)
  • Nonexfoliated (Fine needle aspirations and touch preparations)

Specialized Testing

  • CellSearch® Circulating Tumor Cell (CTC)
    • Metastatic colorectal cancer surveillance
  • PathVysion®
    • HER-2/neu status assessment is now considered standard of care in the selection of therapy for metastatic gastric or gastroesophageal cancer.
    • PathVysion® FISH testing offers the most accurate, reliable HER-2/neu results, enabling physicians to make appropriate treatment decisions that can improve clinical benefit and extend patient survival.
  • Epidermal growth factor receptor (EGFR)
    • Detection of EGFR expression in metastatic colorectal cancer to aid in the identification of patients eligible for treatment with cetuximab (Erbitux) or panitumumab (Vectibix).

Biomarker Analysis

  • Barrett’s BioStrat® Assay
    • A molecular-based assay that provides valuable clinical indication of Barrett's associated neoplasia that is more specific than conventional surveillance methods alone. The assay consists of directly labeled fluorescent DNA probes that can be applied to esophageal cytology brushing specimens or formalin-fixed, paraffin-embedded esophageal tissue specimens collected during endoscopy.
    • Provides information on DNA alterations relating to the detection of Barrett's associated neoplasia and the differentiation of low-grade dysplasia from high-grade dysplasia/adenocarcinoma.
  • Colorectal BioStrat® Assay
    • A molecular-based assay that provides quantitative information on chromosome copy number alterations relating to the detection of active and/or potential colorectal neoplasia and the differentiation of adenoma from adenocarcinoma. The assay consists of directly labeled fluorescent DNA probes that can be applied to formalin-fixed, paraffin-embedded colorectal polyps/tissue specimens.
    • The assay result along with other standard diagnostic procedures can aid informed decisions regarding the surveillance and management of colorectal polyps.


Please contact BioVantra Client Support Center at (866) 301-0960 to arrange for gastrointestinal testing. Our experienced Client Support Team can assist with:

  • Gastroenterology Requisition
  • Sample requirements
  • Logistics and specimen transportation
  • Testing methodology
  • Report delivery, status or interpretation
  • Expert oncology and pathology consultations
  • Requests for BioVantra literature and scientific references