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Novel Imaging Technique Detects Aggressive Kidney Cancer with Unprecedented Accuracy: Lancet Oncology - Video

Published On 2024-10-05T08:15:00+05:30  |  Updated On 5 Oct 2024 3:24 PM IST
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Overview

A new study led by investigators from the UCLA Health Jonsson Comprehensive Cancer Center has demonstrated a new, non-invasive imaging technique that may accurately detect clear-cell renal cell carcinoma, the most common form of kidney cancer.
The findings, published in The Lancet Oncology, could greatly reduce the number of unnecessary surgeries and ensure that patients receive the right treatment at the right time, potentially changing how doctors diagnose and treat the disease in the future.
“If kidney cancer is diagnosed late, the chances of survival drop significantly, especially if the cancer has spread,” said Dr. Brian Shuch, director of the Kidney Cancer Program and the Alvin & Carrie Meinhardt Endowed Chair in Kidney Cancer Research at UCLA, and lead author of the study. “But if caught early, over 90% of patients can survive for at least five years. If we are going to survey more tumors, it’s crucial to accurately identify clear-cell renal cell carcinoma early on as they have a greater propensity to grow and spread.”
To help improve the detection of clear-cell renal cell carcinoma, the team tested a non-invasive method that uses a monoclonal antibody drug called 89Zr-TLX250, which targets the protein CA9 that is often found in clear-cell renal cell carcinoma.
The phase 3 trial, called ZIRCON, included 332 patients with suspect lesions detected on their kidney from 36 research hospitals from nine different countries with UCLA leading international accrual. The average age of participants was 61 years, with 71% being male and 29% female.
The patients were injected with 89Zr-TLX250, which travels through the body and attaches to the protein CA9 if present in the kidney mass. CA9 is highly expressed in up to 95% of clear cell kidney cancers with minimal expression in normal tissue.
A few days after the injection, patients received a PET-CT scan to detect the radioactive part of the drug, which lights up on the scan wherever the protein is present, allowing doctors to see the cancer more clearly. By looking at the scan, doctors can determine if the kidney mass is likely to be cancerous based on whether or not the 89Zr-TLX250 has attached to the cancer cells.
The new imaging method accurately identified the presence of cancer in most cases while minimizing false positives, demonstrating a high performance with 85.5% sensitivity and 87.0% specificity.
The technique also proved effective even in very small renal masses (less than 2 cm), which are increasingly detected due to more frequent use of abdominal imaging. Additionally, the procedure was shown to be safe, with no significant side effects associated with the use of 89Zr-TLX250.
“The implications of this research are vast,” said Shuch. “If adopted widely, 89Zr-TLX250 PET-CT imaging could become a new standard in kidney cancer diagnostics, like how PET-CT imaging has revolutionized prostate cancer management. It could also aid in the detection of other types of kidney cancers and help monitor patients at high risk of metastasis.”
Reference: [89Zr]Zr-girentuximab for PET–CT imaging of clear-cell renal cell carcinoma: a prospective, open-label, multicentre, phase 3 trial. Shuch, Brian et al. The Lancet Oncology, Volume 25, Issue 10, 1277 – 1287

Speakers

Dr. Bhumika Maikhuri

BDS, MDS

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