Martell Diagnostic Laboratories

Martell is dedicated to developing and promoting simple, relatively inexpensive tumor biomarker tests that help medical oncologists manage cancer treatment. In addition to cancer diagnostics development, Martell operates a CLIA (Clinical Laboratory Improvement Amendments) certified national reference laboratory located in Roseville, MN.

Our first offering, HERTEST, replaces an existing serum HER2 test. Metastatic breast cancer is now considered a chronic condition with effective treatments that in many ways allow women to lead a normal or near normal life.  We believe that a simple blood test can effectively monitor medication effectiveness and help detect possible recurrences of HER2 tumors. Therein lies the value of HERTEST for women with metastatic HER2 tumors—the possibility of real-time, actionable information and additional peace of mind.


Our second offering, CHECKMARK, monitors serum levels of PD-L1.  PD-1/PD-L1 (receptor/ligand) binding is an important mechanism often regulating tumor growth. Recognition of this has led to the introduction of new drugs called checkpoint inhibitors. The important yet expensive treatment could be better managed by using a monitoring blood test. 

We welcome the opportunity to communicate with medical oncologists, breast surgeons and interventional radiologists to help deliver he best care possible.