Cystitis & Urogenital Cancer Risk: New Study Links the Two
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Common Bladder Infections May Signal Increased Cancer Risk, Especially in Men
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New research suggests a link between acute cystitis and a heightened risk of urogenital cancers, particularly within three months of infection.
A bout of the common bladder infection, cystitis, may signal the presence of urogenital cancers – cancers affecting the reproductive and urinary systems – in middle-aged adults, according to research published in the open-access journal BMJ Public Health. The risks appear to be especially high within three months of infection, suggesting that acute cystitis might be a useful clinical marker for these cancers.
The study, conducted using extensive Swedish health data, indicates that men may be at a greater risk than women. This finding warrants further investigation to understand the differing biological or behavioral factors at play.
Prevalence of UTIs and Urogenital Cancers
Urinary tract infections (UTIs), of which cystitis is a common type, are highly prevalent. The lifetime prevalence of a UTI is estimated at 50-60% in women and 13-14% in men.Incidence rates increase with age in both sexes,with a notable spike observed in young women.
Previous research has hinted at a link between cystitis and urogenital cancers, but these studies frequently enough lacked data from primary care settings – the primary point of diagnosis for acute cystitis. This new research aims to address that gap.
Study Methodology & Data
Researchers analyzed data from thorough national population and health registers and primary healthcare sources in Sweden, covering the period from 1997 to 2018. The dataset included information on 1,668,371 men (47%) and 1,889,211 women (53%). A total of 605,557 individuals (17%) were diagnosed with acute cystitis for the first time during the study period.
Most cystitis diagnoses (91%) were made in primary care, and the majority of cases occurred in women (71%; 427,821).
Cancer Diagnoses & Association with Cystitis
Over an average follow-up period of 15 years, 257,026 individuals (just over 7%) received a diagnosis of urogenital cancer. Men accounted for the majority of these cases (77.5%; 199,144).
The average age at cancer diagnosis was 73. The most common cancer types were:
| Cancer Type | Percentage of Diagnoses |
|---|---|
| Prostate Cancer | 62% |
| Bladder Cancer | 16.5% |
| Endometrial Cancer | 10% |
Cystitis preceded a cancer diagnosis in 24,137 people - almost 9.5% of all cancer diagnoses during the study period. The average age at diagnosis in this group was 76.The most common cancers diagnosed after cystitis were prostate cancer (39.5%), bladder cancer (32%), and endometrial cancer (14%).
The risk of urogenital cancer diagnosis was elevated across all age groups among those who had experienced cystitis. This risk peaked within three months of infection,