Eosinophilic Cystitis

Eosinophilic Cystitis


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Eosinophilic cystitis is a very rare disease in which a type of white blood cell, the eosinophil, causes injury and inflammation to the bladder. Eosinophilic cystitis is reported to be more common in males, and may affect both adults and children.


  • Painful urination
  • Blood in the urine
  • Feeling the need to urinate frequently
  • Pain in the lower abdomen
  • Urinary tract infections

Associated Diseases:

  • Environmental allergies
  • Asthma
  • ?food allergies


  • Medication reaction (antibiotics, chemotherapy)
  • Allergies


  • Urine sample for analysis
  • Ultrasound of the bladder
  • Eosinophils may be found in the blood and/or urine (not always present)
  • Biopsy of the bladder is necessary to make the diagnosis. Biopsy is done during a cystoscopy.


  • Ultrasound may show thickening or a mass in the bladder
  • Biopsy: Eosinophils invading the bladder wall. Biopsy may show chronic inflammation. Eosinophils should be carefully sought when chronic inflammation is seen.

Allergy Testing

  • Allergy testing may be helpful in patients with other allergic diseases to identify and remove offending allergens.


  • Anti-inflammatory
  • Anti-histamines
  • Steroids
  • Avoid known allergens or triggers


  • May resolve with treatment

Recurrent episodes can occur. Untreated episodes may cause scar tissue to form in the bladder and cause problems with bladder function.

Author: Wendy Book MD, updated 8-30-11, reviewed by Dr. Stephen Kramer MD (Mayo Clinic, pediatric urology)

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