Dr. Gautam Banga
MBBS, MS - General Surgery, MCh - UrologyRecurrent bladder stones can occur when the underlying cause of the original stone is still present. Common reasons include enlarged prostate, incomplete bladder emptying, urethral stricture, bladder dysfunction, recurrent urinary infections, long-term catheter use, bladder diverticula, and certain urinary tract abnormalities. Identifying and treating the underlying cause is an important part of reducing recurrence.
Removing a bladder stone treats the existing stone, but it may not eliminate the reason why the stone formed.
If the underlying urinary problem continues, another stone can develop later.
In adult men, bladder outlet obstruction caused by benign prostate enlargement is one of the most common predisposing factors for bladder stones.
An enlarged prostate can restrict urine flow and prevent the bladder from emptying completely. The remaining urine can contribute to stone formation.
When urine consistently remains in the bladder after urination, minerals and other substances can accumulate and contribute to stone formation.
Incomplete emptying can result from prostate enlargement, bladder dysfunction, urethral narrowing, or other urinary conditions.
A urethral stricture is a narrowing of the urethra that can interfere with normal urine flow.
If the narrowing causes significant obstruction or incomplete bladder emptying, it can contribute to recurrent bladder stones.
Some neurological or functional bladder problems can prevent the bladder from emptying normally.
Patients with neurogenic bladder dysfunction may therefore have an increased risk of recurrent bladder stones.
Chronic bacteriuria and certain urinary infections can be associated with bladder stone formation.
If infections repeatedly occur alongside bladder stones, the urinary tract should be evaluated to determine whether an underlying problem is contributing to both conditions.
Foreign bodies within the urinary tract, including long-term urinary catheters, can contribute to secondary bladder stone formation.
Patients who require long-term catheterisation may therefore need individualized strategies to reduce recurrence.
A bladder diverticulum is a pouch that develops in the bladder wall. Urine may remain trapped in such areas, potentially contributing to stone formation.
Other structural abnormalities of the urinary tract can also increase the risk.
Not every stone found in the bladder necessarily formed there.
A stone originating in the kidney or upper urinary tract can pass into the bladder and subsequently contribute to bladder stone formation. These are known as migratory bladder stones.
If a bladder stone keeps returning, simply removing each new stone may not be enough.
The EAU Guidelines recommend evaluating patients for the cause of bladder stone formation, including assessment of urinary flow, post-void residual urine, urine testing, metabolic evaluation and stone analysis where appropriate. Addressing the underlying cause can help reduce recurrence.
For example:
Bladder stone → incomplete emptying → enlarged prostate → persistent obstruction → recurrent stone
In such a situation, treating only the stone without addressing the prostate obstruction may leave an important risk factor untreated.
Often, the risk can be reduced by addressing the condition responsible for stone formation.
Depending on the patient, this may involve:
The prevention strategy should be individualized according to the cause and type of stone.
At SCI International Hospital, New Delhi, Dr. Gautam Banga evaluates patients with recurrent bladder stones not only for the presence of a new stone but also for the underlying urinary condition that may be causing recurrence.
Depending on the patient's symptoms and history, evaluation may include assessment of urine flow, post-void residual urine, prostate-related obstruction, urethral stricture, urinary infection, bladder function and stone composition.
