Published by Valentis Cancer Hospital at 21st August 2025
Two Tumors, Zero Compromise – CyberKnife S7’s Victory Over Bilateral Kidney Cancer

Mr. Bira Kumar Bhattacharjee, a 70-year-old from Kolkata, faced a life-changing diagnosis of Bilateral Renal Cell Carcinoma. Despite having tumors in both kidneys, advanced treatment at Valentis Cancer Hospital with CyberKnife S7 technology offered a ray of hope. In just a few days, he underwent precise, non-invasive therapy that preserved kidney function and improved his quality of life. Today, he is living cancer-free for over 2 years.
Patient Details
Age & Gender
70 / male
Condition
Bilateral Renal Cell Carcinoma (Kidney Cancer affecting both kidneys)
Symptoms
Significant weight loss, fatigue over 2 months, incidental tumor detection during routine ultrasound
Treatment Goal
To target and destroy cancerous tissue within the prostate gland using non-surgical precision radiation, while avoiding damage to nearby healthy organs and improving overall quality of life.
Main Challenge
Bilateral tumors pose a unique challenge because traditional surgery could lead to significant loss of kidney function, increasing the risk of lifelong dialysis. A targeted approach was crucial to remove cancer cells without damaging surrounding healthy tissue.
Treatment Given
The patient was treated with Stereotactic Ablative Body Radiotherapy (SABR) using the CyberKnife S7 system.
- Precision Planning: Tumor volumes and nearby critical structures were mapped through advanced imaging.
- Radiation Delivery: A single high-dose fraction (27 Gy) was delivered to both kidneys with sub-millimeter accuracy.
- Technology Advantage: The CyberKnife S7 tracked tumor movement in real time, ensuring radiation was focused only on the cancer cells.
Results
- Tumors were successfully targeted and eradicated.
- Kidney function was preserved.
- The patient experienced minimal side effects and was discharged within 2 days.
- 2 years later, he remains cancer-free with excellent quality of life.
Conclusion
Mr. Bira's journey is a powerful reminder that advanced technology and expert care can conquer even the most complex cancers.
Valentis Hai Toh Mumkin Hai — because at Valentis Cancer Hospital, hope meets precision.


