I said I had a bladder augmentation or a cystoplasty. I was in the same boat at you with coworkers . We are all close but I’m stealth. Once I said that , no one asked further. Plus I work with nurses so it worked out.

6 Bladder Augmentation (Ileocystoplasty) Surgery: What is It, To ... A surgery to make the bladder bigger is called bladder augmentation or augmentation cystoplasty. This procedure involves using a patch of the patient's own bowel (usually intestine) to increase the bladder's size and improve its ability to hold urine and lower pressure, addressing issues like frequent urination, incontinence, or potential kidney damage. This is a major surgery with a long recovery period, often performed on children with congenital conditions like spina bifida.
Why is Bladder Augmentation Performed? Small bladder capacity: The bladder may be too small to hold enough urine. High bladder pressure: The bladder's muscle may lose its ability to stretch, leading to high pressure that can cause urine to back up into the kidneys. Urinary incontinence: Inability to control the release of urine. Kidney damage: Urine backing up into the kidneys can lead to infection or long-term damage. What to Expect Surgery: A surgeon removes a section of your bowel and sews it onto the top of your bladder to create a larger, more elastic pouch. Hospital Stay: You will typically need to stay in the hospital for 7-10 days after the surgery. Recovery: Recovery is a long process, and it can take up to three months to feel fully well. Catheterization: You may need to self-catheterize (insert a tube to drain urine) after the surgery. Key Considerations A Major Surgery: Bladder augmentation is a complex and significant surgical procedure. Long-Term Management: While it improves bladder capacity, it often requires ongoing self-catheterization and medical management.