Germ Cell Tumor Clinical Trial
Official title:
RAISN - Robot-assisted ICG-guided Sentinel Node Biopsy in Testicular Cancer
Robot-assisted image-guided sentinel lymph node biopsy (RAISN) in testicular cancer is a novel technique that has not been widely investigated yet. This technique is promising and could be implemented as a future standard in the primary diagnostic work up of clinical stage (CS) I testicular cancer. Current staging strategies have a poor predictive accuracy for occult metastatic disease. So far, feasibility studies used 99mTC-nanocolloid staining and laparoscopy and all patients with tumor-positive nodes received adjuvant systemic treatment. The development of a robot-assisted image-guided lymph node resection technique with indocyanine green (ICG) is potentially more precise, easier to apply and widely available. With this new diagnostic approach the management of newly diagnosed testicular cancer patients might be changed dramatically by reducing overtreatment and treatment-related toxicity with a minimally invasive robot-assisted procedure.
The sentinel lymph node biopsy in testicular cancer is a novel technique that has not been extensively studied. This technique shows promise and could potentially become the future standard in the primary diagnosis of testicular cancer in clinical stage I. In cases of clinical stage I testicular cancer, 20% to 30% of patients experience a recurrence. Strategies such as adjuvant chemotherapy or retroperitoneal lymph node dissection can reduce the risk of recurrence to 2% and 9%, respectively. However, the issue with these strategies is that the majority of patients may receive unnecessary treatment and endure the toxicity of chemotherapy or surgery. German and European guidelines recommend a risk-adapted approach. Testicular tumor patients with specific histopathological features are classified into low and high risk, with adjuvant therapy recommended accordingly. This strategy allows for more targeted treatment but still maintains a limited sensitivity of approximately 73%. There have been few studies investigating the possibility of sentinel lymph node diagnostics in testicular cancer. Reasons for this include the rarity of the disease coupled with a lack of experience in minimally invasive surgery for testicular cancer treatment. Previous sentinel lymph node studies utilized the radioligand technique with technetium, which was limited to centers with a nuclear medicine department. With the advancing development of robotics and fluorescence technology using indocyanine green, there is an opportunity for a novel, minimally invasive lymph node diagnostic method applicable on a broader scale for testicular cancer patients. In previous feasibility studies on sentinel lymph node diagnostics in testicular tumor patients, the use of 99mTC-nanocolloid staining and laparoscopy achieved a 90% sensitivity. The development of a robot-assisted image-guided lymph node resection technique using indocyanine green (ICG) is potentially more precise, easier to apply, and generally more available. Multiple studies in other tumor entities have demonstrated the non-inferiority and superiority of ICG over technetium. This new diagnostic approach could drastically change the treatment for newly diagnosed testicular cancer patients by reducing overtreatment and treatment-related toxicity through a minimally invasive robot-assisted procedure. ;
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