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	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

To the Editor: First reported by E. L. Keyes in 1882,¹ emphysematous cystitis is a rare complication of urinary tract infection, characterized by spontaneous gas formation in the urinary bladder. Patients with cystic fibrosis (CF) have several risk factors that predispose them to urolithiasis, such as hyperoxaluria, hypercalciuria, hyperuricosuria, and increased urinary saturation of calcium oxalate.^2-3 Diabetes due to the pancreatic insufficiency common in CF may further increase risk of urinary infections and formation of renal stones.^2-3 However, to our knowledge occurrence of emphysematous cystitis has not been reported in patients with cystic fibrosis. We describe a case of emphysematous cystitis and renal stones in a patient with cystic fibrosis.

Report of a Case

A 23-year-old white woman was hospitalized for nausea and colicky lower abdominal and back pain lasting 2 days. While hospitalized she passed 6 small stones in her urine. Her past medical history included CF with pancreatic insufficiency, insulin-dependent diabetes, and . . . [Full Text of this Article]

Daya Upadhyay, MD
upadhyayd@pol.net
Division of Pulmonary and Critical Care Medicine
Stanford University Medical Center
Stanford, Calif

Manu Jain, MD
Division of Pulmonary and Critical Care Medicine
Northwestern University Feinberg School of Medicine
Chicago, Ill

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