Urinary tract infection (UTI) affects mostly women. Any condition that allows stasis or urinary obstruction predisposes to the development of UTI.
The authors report the case of a 37-year-old woman with a recurrent UTI who presented with right lumbar pain irradiating to homolateral inguinal region and genito-urinary symptoms, and a pelvic extensive lesion was shown in the abdominal-pelvic CT in apparent relationship with L5 nerve root compatible with a Schwannoma.
Schwannomas are usually benign tumors that rarely present malignant transformation. Repetitive UTIs may be a consequence of the mass effect or of neurological cause secondary to intraspinal schwannomas that cause urinary retention. Local recurrence or malignant change is possible, so complete tumor resection is important.

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