UrologyDr. Yajvender Pratap Singh RanaUrology & Kidney Transplant

Senior Director, Urology, Uro-Oncology, Andrology and Kidney Transplant, BLK-Max Super Speciality Hospital, New Delhi

Part 3 of 10 in Advances in Urology, Uro-Oncology and Kidney Transplant

Kidney Stone Management: Why Stones Are Never a Silent Disease

November 23, 2025

Dr. Rana has not given a single incision for a kidney stone patient in 15 years. Whatever the size of the stone, treatment now relies on lasers and endoscopes rather than open surgery, and his central message to referring doctors is that stones are a metabolic disease that grows and damages the kidney over time, never a condition to leave unaddressed because a patient reports no symptoms.

Matching the technique to the stone

Retrograde intrarenal surgery (RIRS), performed with a flexible ureteroscope, reaches into the kidney's collecting system to fragment stones with a laser, basket the fragments out, and clear the tract, all without any incision, blood loss, or more than a single day's hospital stay. With a thulium fibre laser, RIRS can clear stones up to around 2.5 to 3 cm. For larger stone burdens, including cases where both kidneys are extensively affected, percutaneous nephrolithotomy (PCNL), typically through a three-puncture technique, clears the stone load through the kidney directly. Robot-assisted pyelolithotomy is reserved for the most complex cases, including patients with bony deformities that make positioning difficult.

Why early treatment matters

Stones increase in size, obstruct the urinary tract, and damage the kidney the longer they are left untreated. Dr. Rana's standing advice to referring doctors is straightforward: there is no such thing as a silent stone that can be safely ignored, and every patient found to have one should be directed toward treatment rather than observation.

This article is based on a Jivo Masterclass session conducted by Dr. Yajvender Pratap Singh Rana, Director, Urology, Uro-Oncology, Andrology and Kidney Transplant, BLK-Max Super Speciality Hospital, New Delhi. The article has been summarised with the assistance of an AI tool from the original masterclass recording. Watch the full Masterclass recording

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This guide is based on a live Jivo Masterclass — Dr. Yajvender Pratap Singh Rana taught doctors across Africa on November 23, 2025.

FROM THE LIVE Q&A

DR

Dr. Ivan

Can we risk a transplant even when the HLA match, for both donor and recipient, is low?

YP

Dr. Yajvender Pratap Singh Rana

Yes, HLA incompatibility alone is not a major problem, even between spouses with no HLA match at all. What actually determines eligibility is the cross match: a negative CDC and flow cross match clears the way for transplant. If CDC is negative but flow is positive, donor-specific antibody testing by the single antigen bead method quantifies the real risk, an MFI reading up to roughly 1,500-2,000 is not a concern, while higher readings call for plasmapheresis first. The key requirement is simply that there should be no antibodies against that particular HLA antigen.

See all 8 questions from this masterclass →

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Frequently Asked Questions

How do you get a compatible cadaveric kidney donation for transplant, and what is the timing involved?

Whenever a brain-dead donor is identified anywhere in Delhi NCR, India's national organ transplant authority (NOTTO) is notified and coordinates two brain stem death declarations roughly two hours apart, made jointly by the primary caregiver and a neurointensivist or equivalent specialist. Once the family consents, NOTTO allocates the organ from its waiting list strictly by turn order across hospitals, no single centre can claim it outside that process. From the first declaration to organ harvest is roughly a 12-hour process, with the recipient's dialysis and cross-match run in parallel so the transplant can proceed within six to twelve hours of harvest.

What can be done for cases of transplant rejection where the antibody attacks the new kidney?

This is antibody-mediated rejection (AMR), one of two categories of acute rejection alongside cell-mediated rejection (ACR), and a kidney biopsy is needed to tell them apart. Treatment usually starts with methylprednisolone pulses, escalating to anti-thymocyte globulin or plasmapheresis if that isn't enough. In over a decade, hyperacute rejection has not been seen in blood-compatible transplants at this centre, and most rejection today is reversible when caught and treated promptly, the real danger comes from delayed treatment, not from the rejection episode itself.

How does one ethically navigate finding a living donor without pressuring family or friends?

Donation has to come from love and compassion, never pressure. What actually works is reframing donation as a chance for the donor to become healthier: the thorough medical workup required for donor clearance means any underlying problem gets caught and treated, so donors go on to outlive their peer group rather than being harmed by donating. Where genuine pressure would otherwise be needed, keeping the recipient on dialysis while continuing to look for a willing donor is the ethical path, alongside broader deceased-donor campaigns to reduce reliance on living donors altogether.

Looking to the future, is there a possibility that xenotransplantation, using animal kidneys such as from a sheep, could work in humans?

It is being tried, but the outlook is not promising because of tissue rejection and the risk of transmitting animal viruses, including parvovirus, into the recipient, so the success of xenotransplantation is still genuinely questionable. Far more promising is tissue-engineered, artificially grown organs: a related technique already in use is tissue-engineered buccal mucosa grafting for urethral stricture, where a small piece of cheek tissue is cultured in a lab and implanted into the urethra, a real, working example of the technology-biology merger that is likely to define the field's near future.

What is the cost of kidney transplant, what are the criteria for donor selection, and at what stage of kidney failure do you advise transplant?

A routine mini-incision laparoscopic transplant package costs approximately USD 13,000-14,000, with an additional USD 3,000 for a fully robotic transplant. Donor selection starts with a related donor within the immediate family, confirmed by DNA testing, with extended family only considered if no closer relative is eligible, alongside blood-group and basic health workup. Transplant is generally advised once creatinine exceeds 7, with signs of fluid overload or hyperkalaemia, shrunken kidneys with reduced urine output, and a raised PTH indicating the kidneys will not recover, with an practical age ceiling of around 80 depending on the patient's actual physiological fitness.

What is retrograde intrarenal surgery (RIRS) and what size stones can it treat?

RIRS uses a flexible ureteroscope passed into the kidney to fragment stones with a laser and remove the pieces, with no incision, minimal blood loss and typically a one-day hospital stay. With a thulium fibre laser, it can clear stones up to around 2.5 to 3 cm.

Why does Dr. Rana say kidney stones are never a silent disease?

Stones are a metabolic disease that increases in size, obstructs the urinary tract and damages the kidney over time, even when a patient has no symptoms. His standing advice is that every stone found should be treated, not observed.

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