Ultrasound Diagnosis of Spontaneous Nephrocutaneous Fistula

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The article is based on a case that describes the formation of a spontaneous nephrocutaneous fistula caused by renal stones. A spontaneous fistula of the kidney to the adjacent organs is a somewhat common phenomenon. The spontaneous fistula between the kidney and skin is a rare situation often associated with surgical or interventional procedures. Very few cases of nephrocutaneous fistulae are documented in the literature.1–3 There are various causes of nephrocutaneous fistulae, but the most common cause of nephrocutaneous fistula is the complication of surgical and interventional procedures, trauma, and renal tumors. Some of the other causes are renal calculous, renal tuberculosis, chronic pyelonephritis, and stricture of the ureteropelvic junction.

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