A 35-year-old healthy premenopausal woman presented with a 24-hour history of worsening dysuria and urinary frequency. She had no associated flank pain or costovertebral angle tenderness to suggest pyelonephritis. Urine dipstick testing was positive for leukocyte esterase and nitrite. The patient reported two documented urinary tract infections (UTIs) in the past eight months. Her previous urine cultures had grown pan-sensitive Escherichia coli, and her symptoms had resolved promptly with oral antibiotics.
What diagnoses should be considered in this patient?The most likely diagnosis is recurrent UTIs. These recurrent infections are important given their high prevalence and their negative effect on quality of life.1 Other potential diagnoses to consider include sexually transmitted infection, bladder pain syndrome, pelvic floor dysfunction, overactive bladder and vaginitis (Box 1).
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Does this patient need further investigations?Recurrent UTIs are common: 20%-50% of women will experience at least one UTI recurrence after their index infection and a subset (about 5%) will have multiple recurrences, often within the first three months after the index infection.3 For most of these women, further evaluation is not necessary. In a case series of young women with frequent UTIs, cystoscopy and renal or pelvic imaging did not reveal any important abnormalities that influenced patient management.
4Further testing should be limited to women with atypical features or with multiple episodes of pyelonephritis. Complicating factors that may suggest the patient should be referred to a specialist include prior urologic or pelvic floor surgery, history of renal stone disease, genitourinary or neurologic abnormalities, substantial urinary symptoms (e.g., severe urinary urgency or frequency, or urinary-related pain), radiation to the pelvis, or inadequate response to antibiotics.
4What lifestyle changes should be recommended? Doctors have long recommended a "common sense" collection of suggestions for avoiding UTIs, such as good perineal hygiene, natural underwear material, postcoital voiding, and improved fluid intake and voiding habits. However, when these factors were evaluated in a large case-control study, these conservative measures Decisions