Fungus ball and fungal emphysematous cystitis are two rare complications of fungal urinary tract infection. A 53-year-old male patient presented with these complications caused by Candida tropicalis simultaneously. The predisposing factors were diabetes mellitus and usage of broad-spectrum antibiotics. The fungus ball, measuring 3.5 × 2.0 cm on the left wall of the urinary bladder, shrank significantly to 1.6 × 0.8 cm after 5 days of intermittent irrigation with saline before surgery. With transurethral removal of the fungus ball and antifungal treatment with fluconazole, the patient fully recovered. We conclude that a bladder fungus ball and fungal emphysematous cystitis should always be suspected in patients with diabetes mellitus with uncontrolled funguria and abnormal imaging. Treatment should include a systemic antifungal therapy and thorough surgical removal of the fungus ball. A systemic antifungal therapy combined with a local irrigation with saline or antifungal drugs might help decrease the dissemination of fungemia during an invasive manipulation.
Case reportA 53-year-old male was referred to our department in February 2015 with intermittent, but recently aggravated cloudy urine. The symptom had been ongoing for 9 years, sometimes with frequency and urgency. No blood urine or fever was ever reported. To control the symptoms of cystitis, the patient underwent multiple treatments with broadspectrum antibiotics during this 9-year period. Twice, fungus was found in his urine (9 years and 6 years ago).The patient had uncontrolled type II diabetes mellitus for more than a decade. He also suffered from a right kidney stone and underwent a percutaneous nephrolithotomy 18 years ago. Physical examination was unremarkable. A routine urine test showed significantly elevated red blood cells (56.1/HP, normal <4.5/HP) and white blood cells (328.7/HP, normal <5.4/HP). Blood tests were normal, except for an elevated fasting glucose level of 7.7 (range: 3.6-6.1) mmol/L. Sonography revealed a medium-to hypo-echoic bladder tumour, measuring 3.5 × 2.0 cm. It was located on the left wall of the urinary bladder, did not move with posture changes, and had no sign of blood flow (Fig. 1a). A computed tomography (CT) revealed no intravesical mass in either the unenhanced or dual-enhanced phase. Only a very faint filling defect was found in the excretory phase. Moreover, a large round gas collection was found in the bladder, and a 1.1 × 0.9-cm calculus revealed a right distal ureter, leading to mild unilateral hydronephrosis and ureterectasis (Fig. 1b).Urinary cytology showed a large number of hyphae and neutrophil granulocytes. Candida tropicalis was isolated from the urine, but the blood culture was negative. Because a fungus ball secondary to Candida tropicalis was highly suspected at this time, intermittent bladder washouts with saline (2 L per time and 3 times per day) were performed via an indwelling three-cavity urinary catheter. A mass of floccules were flushed out during early irrigation. A rechecked sonography ...