What the study found
The study reports a 78-year-old man who developed two very large stones in an ileal neobladder after 18 years without urological follow-up. Open cystolithotomy, a surgical procedure to remove bladder stones through an incision, removed both stones successfully.
Why the authors say this matters
The authors conclude that this case shows the need for lifelong structured follow-up for people with urinary diversions such as a neobladder, an intestinal bladder substitute created after bladder removal. They also state that preventive measures are important to avoid severe stone formation.
What the researchers tested
This is a case report, so the researchers described one patient’s history, imaging findings, surgery, stone analysis, and follow-up. Computed tomography was used to measure the stones, and the removed stones were analyzed for composition.
What worked and what didn't
The patient had two stones measuring 10×8×6 cm and 9×7×8 cm, with a combined weight of 950 grams. Open cystolithotomy removed both stones in 90 minutes with minimal blood loss and no complications, and the patient had symptom resolution, stone-free imaging, and stable renal function during 12 months of follow-up.
What to keep in mind
This is a single case report, so it describes one person rather than a larger group. The abstract also notes that the patient was later lost to follow-up again, and it does not provide comparative data on other treatments.
Key points
- A 78-year-old man developed two giant stones in an ileal neobladder after 18 years without urological follow-up.
- The stones measured 10×8×6 cm and 9×7×8 cm and weighed 950 grams together.
- Open cystolithotomy removed both stones with minimal blood loss and no complications.
- Stone analysis showed pure struvite-carbonate apatite, linked in the abstract to chronic Proteus mirabilis infection.
- The authors emphasize lifelong structured follow-up and preventive care for urinary diversion patients.
Disclosure
- Research title:
- Open cystolithotomy removed giant neobladder stones after long follow-up loss
- Authors:
- Youssef Maachi, Amine EL Boustani, Amine Salim Lalaoui, Amine Slaoui, Tarik Karmouni, Abdellatif Koutani, Khalid Elkhader
- Institutions:
- Mohammed V University, Mohammed V University, Mohammed V University, Mohammed V University, Mohammed V University, Mohammed V University, Mohammed V University
- Publication date:
- 2026-04-02
- OpenAlex record:
- View
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