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Squamous cell carcinoma (SCC) of the bladder is a rare malignancy in Western countries accounting for only 5% of all primary bladder cancers. Chronic irritation is the predominant risk factor, with chronic infections, bladder stones and long term catheterisation common precursors. The highest incidence of SCC occurs in patients with spinal cord injuries who rely on indwelling or self-catheterisation for bladder drainage. We report a case of primary SCC of the bladder secondary to a fungal ball located in the renal pelvis. Case report A 72 year-old lady was referred to our unit for further investigation of recurrent polymicrobial urinary tract infections associated with intermittent flank pain and complicated by sepsis. Investigations into the cause for her recurrent urinary tract infections identified a mass in her left renal pelvis. Pyeloscopy demonstrated no tumour, but a fungal ball. Attempts to clear the fungal ball via pyeloscopy resulted in recurrent intensive care unit (ICU) admission for urosepsis. Several months after her last pyeloscopy she returned with haematuria. Cystoscopy at this time revealed a large bladder mass. Biopsy revealed primary SCC of the bladder invading muscle. At cystectomy the mass had invaded pubic bone and was unresectable and a palliative ileal conduit was formed. The patient passed away less than 4 months following diagnosis. Conclusion We report what we believe to be the first case of primary SCC of the bladder secondary to a renal pelvis fungal ball. Despite frequent surveillance of her urinary tract the tumour developed rapidly and was unresectable at diagnosis.

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Case Report: Primary squamous cell carcinoma of the bladder secondary to chronic renal fungal ball and recurrent polymicrobial urinary tract infections.