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16 Diagnosis









1980-1997 study

1982-1985 study

1993-1995 study


10 %

44 %

15 %


12 %

3 %

1 %


0.3 %

0 %

2 %


63 %

55 %

73 %



Feline Idiopathic Cystitis


Feline idiopathic cystitis (FIC)-also called interstitial cystitis-is the most common diagnosis in cats with lower urinary tract signs. FIC is a diagnosis of exclusion, meaning that the term FIC is used if all diagnostics fail to confirm the presence of another disease such as urinary stones. Cats suffering from FIC make frequent attempts to urinate, probably as a result of bladder discomfort, and often are found to have blood in their urine. Signs of lower urinary tract disease in cats with non-obstructive FIC often resolve spontaneously within a couple of weeks regardless of treatment. Most treatments attempt to prevent subsequent recurrence of signs.

Stress seems to be an important factor in the development of FIC in cats. Possible sources of stress in a cat's life may include environmental changes, changes in food schedule, and changes in the number of animals in the household. Environmental enrichment and modification can reduce stress and decrease the severity and frequency of FIC episodes.
Feline Idiopathic Cystitis
By Wendy C. Brooks DVM, DABVP


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