What happens if a bladder stone is too large for endoscopic removal?

If a bladder stone is very large or cannot be safely removed through a transurethral approach, the urologist may consider an alternative procedure such as percutaneous cystolithotripsy or open cystolithotomy. The choice depends on the stone's size and location, urinary anatomy, previous surgeries, urethral condition, and the patient's overall health. The EAU Guidelines specifically recommend considering open cystolithotomy as an option for very large bladder stones.

Most adult bladder stones can be treated using minimally invasive techniques. The EAU recommends transurethral cystolithotripsy where possible, because it generally provides effective stone clearance with shorter hospitalisation and recovery compared with open surgery.

However, a very large stone or difficult urinary anatomy may make a standard endoscopic procedure less suitable.

What is considered a very large bladder stone?

There is no single size at which every bladder stone automatically requires open surgery.

Treatment depends on more than the measurement alone, including:

• Stone size and volume.
• Number of stones.
• Stone location.
• Urethral anatomy.
• Previous urethral surgery.
• Bladder anatomy.
• Presence of urinary obstruction.
• The equipment and expertise available.

Therefore, a large stone does not automatically mean open surgery is required.

Can a very large bladder stone still be treated endoscopically?

Sometimes, yes. Large bladder stones may still be fragmented using endoscopic techniques, including laser, pneumatic, mechanical or ultrasonic lithotripsy.

The EAU notes that different lithotripsy modalities can be used during transurethral cystolithotripsy, with generally comparable stone-free outcomes.

However, if the stone is extremely large or the transurethral route is not practical or safe, another approach may be more appropriate.

What is percutaneous cystolithotripsy?

Percutaneous cystolithotripsy involves creating a small access tract directly into the bladder through the lower abdominal area.

An instrument is then introduced through this access to fragment and remove the stone.

This can be considered when transurethral treatment is not possible or advisable. The EAU recommends percutaneous cystolithotripsy in such circumstances.

When is open bladder stone surgery considered?

Open cystolithotomy involves making an incision to directly access the bladder and remove the stone.

The EAU considers open cystolithotomy an option for very large bladder stones in adults and children, although endoscopic and percutaneous approaches are generally preferred when feasible.

Open surgery may be particularly useful when:

• The stone is exceptionally large.
• Endoscopic access is difficult.
• The urinary anatomy is complex.
• Another open procedure is already being performed.
• Minimally invasive approaches are unlikely to provide satisfactory stone clearance.

Does a large bladder stone always require open surgery?

No. The treatment decision should be individualized.

A large stone may sometimes be fragmented and removed endoscopically or through a percutaneous approach. The urologist will select the safest and most effective technique based on the patient's anatomy and clinical circumstances.

Can a large bladder stone be treated during prostate surgery?

Yes, in selected patients.

When a large bladder stone is associated with significant prostate obstruction, the stone and prostate problem may sometimes be treated during the same surgical session.

The EAU reports that combined bladder stone treatment and treatment of benign prostate obstruction can generally be performed safely in appropriately selected adults.

What Happens If the Stone Cannot Be Completely Removed in One Procedure?

In some complex cases, the urologist may determine that more than one treatment session is safer than attempting to remove everything during a single prolonged procedure.

The decision depends on:

• Stone burden.
• Operative time.
• Patient safety.
• Access to the bladder.
• Stone fragmentation and clearance.
• Associated urinary conditions.

Your urologist can explain whether a single-stage or staged approach is more appropriate.

Why Is Treating the Underlying Cause Important?

A very large bladder stone may be the result of a long-standing urinary problem such as bladder outlet obstruction or incomplete bladder emptying.

Removing the stone without addressing the underlying cause may increase the likelihood of recurrence.

For this reason, the EAU recommends investigating patients with bladder stones for the cause of stone formation, including assessment of urinary flow and post-void residual urine, along with appropriate urine testing and other investigations when indicated.

SCI International Hospital

At SCI International Hospital, New Delhi, Dr. Gautam Banga evaluates large and complex bladder stones based on their size, location, urinary anatomy and associated conditions.

Depending on the individual case, treatment may involve endoscopic stone fragmentation, laser treatment, percutaneous cystolithotripsy or another appropriate surgical approach. If enlarged prostate or another urinary obstruction contributed to the stone, that underlying condition can also be assessed as part of the treatment plan.