Diagnosis: Multiple Uterine Leiomyomas with Partial Obstructive Uropathy and Uterovesical Calculus
The diagnosis is multiple uterine leiomyomas (fibroids) causing compressive partial obstructive uropathy with an associated uterovesical calculus—a rare but serious complication requiring urgent evaluation of renal function and coordinated surgical management.
Clinical Presentation and Diagnostic Approach
This presentation represents a complex gynecologic-urologic emergency. The key diagnostic elements include:
Immediate Assessment Required
Renal function evaluation: Measure serum creatinine and calculate GFR immediately. Studies show that 10.5% of patients with symptomatic uterine leiomyomas develop obstructive nephropathy, with creatinine levels ranging from 1.8-6.7 mg/dL and GFR as low as 9 ml/min/1.73m² 1.
Imaging confirmation: Cross-sectional imaging with MRI is preferred over ultrasound to confirm leiomyoma diagnosis, characterize the calculus, assess degree of ureteral obstruction, and exclude other pelvic pathology 2. MRI provides superior detail for surgical planning in complex cases.
Bilateral assessment: Even with unilateral symptoms, evaluate both kidneys—bilateral hydroureteronephrosis occurs frequently with large fibroids 3, 4, 5, 6.
Critical Diagnostic Pitfalls
Large cervical or lower uterine segment leiomyomas are frequently misdiagnosed. Cases demonstrate that pedunculated submucosal fibroids prolapsing into the vagina can be mistaken for intracervical fibroids on both physical examination and initial imaging 3. The presence of a uterovesical calculus adds diagnostic complexity and suggests chronic bladder irritation or obstruction.
Understanding the Pathophysiology
The mechanism involves:
- Direct ureteral compression by enlarged uterus or specific fibroid location (particularly posterior, cervical, or lower segment fibroids)
- Bladder outlet obstruction from anterior displacement of the cervix or direct bladder compression 7, 8
- Calculus formation likely secondary to chronic urinary stasis and bladder irritation from the mass effect
Uterine size correlates directly with uropathy risk. Research demonstrates positive association between myoma diameter and development of obstructive nephropathy, with patients having uropathy being significantly more likely to develop nephropathy (CI 95% 3.281-108.670) 1.
Management Algorithm
Step 1: Stabilize Renal Function
- If creatinine >2.0 mg/dL or severe bilateral hydronephrosis: Place bilateral percutaneous nephrostomy tubes or ureteral stents BEFORE definitive surgery 5, 6
- Monitor for improvement in creatinine over 1-2 weeks
- Do not delay decompression—irreversible kidney damage can occur 5
Step 2: Address the Calculus
- Coordinate with urology for calculus management
- May require cystoscopic removal or lithotripsy depending on size and location
- Can often be addressed at time of definitive surgery if small
Step 3: Definitive Surgical Management
For patients not desiring fertility preservation:
- Total abdominal hysterectomy with bilateral salpingo-oophorectomy is the definitive treatment 3, 4, 6, 8
- Expect technical difficulty with large cervical fibroids—bladder injury risk is significant 6
- Ureteral stents should remain in place for 3 months post-operatively if significant hydronephrosis present 6
For fertility preservation candidates:
- Myomectomy is feasible but technically challenging with large fibroids 5
- Consider uterine artery embolization (UAE) as alternative—case reports show resolution of hydroureteronephrosis at 12 months with >66% fibroid necrosis and improved renal function 9
- UAE has 81-100% clinical success rates and 95% symptomatic improvement at 12 months 2
Step 4: Post-operative Monitoring
Complete recovery of renal morphology and function typically occurs by 3-6 months post-surgery 3, 4, 6, but some patients retain elevated creatinine indicating irreversible damage 5. Serial ultrasound and creatinine monitoring every 4-6 weeks until normalized.
Key Clinical Warnings
⚠️ Maintain high suspicion for obstructive uropathy in ANY patient with large uterine fibroids (>10 cm), especially with:
⚠️ The prevalence of obstructive uropathy in symptomatic fibroids is 22.8%—far more common than historically believed 1. This is NOT a rare complication.
⚠️ Approximately 1 in 350 women undergoing surgery for fibroids has unsuspected uterine sarcoma 2—histopathologic examination is mandatory.