Symptoms of Hemorrhagic Cystitis in Third Trimester
Hemorrhagic cystitis in the third trimester presents with gross hematuria (visible blood in urine) accompanied by classic cystitis symptoms including dysuria (painful urination), urinary frequency, urgency, and pelvic discomfort—and critically, it can trigger preterm labor requiring immediate aggressive management.
Clinical Presentation
The hallmark symptoms include:
- Gross hematuria (macroscopic blood in urine) - the defining feature
- Dysuria (painful, burning urination)
- Urinary frequency (needing to urinate more often than normal)
- Urgency (sudden, compelling need to urinate)
- Pelvic pain or discomfort
- Preterm labor contractions - a critical complication unique to pregnancy 1, 2
Severity Spectrum
While hemorrhagic cystitis is typically self-limiting in non-pregnant populations, pregnancy cases can be severe and life-threatening 1, 2. The condition may progress to:
- Significant blood loss requiring transfusion
- Hemorrhagic shock
- Premature labor that is resistant to standard tocolytic therapy
- Anemia requiring intervention
Important Clinical Context
The etiology in pregnancy is often unidentified 2. When identified, causes include:
- Bacterial infections (most common)
- Viral infections (particularly CMV in immunocompromised patients) 3
- Chemical irritants
Critical red flags requiring immediate intervention:
- Heavy bleeding with clots
- Signs of hypovolemia (dizziness, tachycardia, hypotension)
- Onset of regular uterine contractions
- Fever suggesting ascending infection or sepsis
Diagnostic Approach
When hemorrhagic cystitis is suspected:
- Urinalysis showing hematuria and pyuria
- Urine culture to identify bacterial pathogens
- Complete blood count to assess degree of blood loss
- Cystoscopy may show diffuse bladder inflammation and bleeding, though findings can be non-specific 2, 3
- Bladder biopsy if CMV or other unusual pathogens suspected in immunocompromised patients 3
Common Pitfall
Do not dismiss gross hematuria in pregnancy as simple UTI or normal pregnancy changes. The combination of hematuria with preterm contractions demands urgent evaluation and aggressive management, as standard antibiotic therapy alone may be insufficient 1, 2.