Expert Pathologic Review Demonstrates Notable Significance in Lymphoma Care

A new study published by the Journal of Clinical Oncology proposes that pathologic review has direct implications on lymphoma diagnosis and management.

Over a four-year span, the Lymphopath Network, a national hematopathology expert network in France that reviews lymphoma cases prior to therapeutic decision, reviewed over 30,000 samples from patients with newly diagnosed or suspected lymphoma. Researchers found that a change in diagnosis from original referral to expert review occurred in almost 20 percent of patients, and the change was significant enough to potentially impact care in over 17 percent of patients.

Diagnostic discrepancies were greater in patient samples sent with a provisional diagnosis than in those sent with a formal diagnosis, meaning that when referring pathologists were confident about the diagnosis, they were typically correct. Although most discrepancies were due to misclassifications of lymphoma subtypes, some patients were referred with benign conditions that were deemed lymphomas after pathologic review.

The study implies that frequently, in order for patients to receive optimal care, their diagnoses are best determined in collaboration with expert pathologists – especially in the current age of personalized medicine.

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Dr. Peter Martin

“As doctors who take care of people with cancer, so much of what we do is dependent on having a precise diagnosis,” said Peter Martin, Chief of the Lymphoma Program at Weill Cornell Medicine and NewYork-Presbyterian. “My bias is to meet people early on so that I can help direct the diagnostic evaluation, minimize unnecessary testing, and work with our experts in radiology, surgery, and pathology to arrive at the correct diagnosis as rapidly as possible. Importantly, the findings from the Lymphopath Network study highlight that even when a diagnosis has already been made, a second opinion regarding pathology can be important, particularly when there is any diagnostic uncertainty.”

As part of our mission to deliver precise, individualized care to as many patients as possible, expert hematologists and oncologists at the Weill Cornell Medicine and NewYork-Presbyterian Lymphoma Program collaborate with our team of world-class hematopathologists to provide collective assessment of all individual cases, working our hardest to secure an accurate diagnosis before proceeding with the appropriate therapy.

FDA Approves Subcutaneous Administration of Rituximab for Three Lymphoma Types

On June 22, 2017, the United States Food and Drug Administration (FDA) approved subcutaneous injection of rituximab plus hyaluronidase human for people with follicular lymphoma (FL), diffuse large B-cell lymphoma (DLBCL), and chronic lymphocytic leukemia (CLL). Subcutaneous administration refers to the method of delivering a drug under the skin rather than directly into a vein as performed during intravenous (IV) administration.

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Administration of rituximab under the skin tends to take less than 10 minutes, whereas the traditional IV method can last several hours. The technique also allows for fixed dosing, which can reduce preparation time and excess drug waste, and may be more cost effective than IV infusion.

The approved treatment is to be employed only after patients have received at least one cycle of intravenous rituximab.

Approval comes based on the results of a series of clinical trials demonstrating comparable safety and efficacy outcomes across subcutaneous and intravenous administration.

FDA-Approved Drug to Treat Viral Infections Shows Promise Against Lymphomas

Ribavirin, a drug that has been approved by the Food and Drug Administration (FDA) to treat hepatitis C, as well as some viral respiratory infections and viral hemorrhagic fevers, has shown promising activity against some types of lymphoma. There is a growing movement to repurpose older drugs that might have mechanisms of action that could benefit cancer patients.

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Dr. Leandro Cerchietti

Based on preclinical work performed in the laboratory of Dr. Leandro Cerchietti, the Weill Cornell Medicine and NewYork-Presbyterian Lymphoma Program is planning a clinical trial examining the oral antiviral drug ribavirin in patients with two non-Hodgkin lymphoma subtypes, slow growing follicular lymphoma and mantle cell lymphoma. This clinical trial will be led by principal investigator Dr. Sarah Rutherford.

Previously, physicians and scientists in the Weill Cornell Medicine Lymphoma Program have demonstrated that ribavirin may be able to inhibit lymphoma cell growth. Dr. Cerchietti’s laboratory research has shown that the eukaryotic translation initiation factor 4E (eiF4E) is blocked by ribavirin in B-cell lymphoma cell lines, as well as in patient-derived xenograft (PDX) models, which more closely resemble the way cancer behaves in the human body. Blocking eiF4E ultimately leads to decreases in key proteins (MYC, BCL2, and BCL6) which are crucial for lymphoma cells’ survival.

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Dr. Sarah Rutherford

Additionally, Dr. Rutherford conducted a retrospective review of patients with lymphoma who underwent stem cell transplants at NewYork-Presbyterian Hospital/Weill Cornell Medicine. Patients who were treated with ribavirin for viral infections just before or after their stem cell transplant had better lymphoma-related outcomes compared to what was expected based on their disease risk profiles.

This clinical trial, run by Dr. Rutherford and Dr. Cerchietti, will enroll patients with follicular lymphoma and mantle cell lymphoma, and they will receive 3-6 months of oral ribavirin. Using a blood test, Dr. Rutherford and Dr. Cerchietti will monitor for the presence of a marker of lymphoma in the blood to confirm that ribavirin has the intended anti-lymphoma effect.

“We are excited about opening this clinical trial and aim to conduct additional trials in the future that combine ribavirin with other drugs,” said Dr. Rutherford. “Our goal is to ultimately develop a well-tolerated, targeted oral regimen to control lymphomas.”

This preclinical research is supported by a Translational Research Program from the Leukemia and Lymphoma Society (LLS) awarded to Dr. Cerchietti.