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  • Title: [The silent kidney. Evolving ultrasonic picture of emphysematous pyelonephritis: the vanishing kidney. Apropos of a case].
    Author: Eisenscher A, Reck A, Edel L, Jurascheck F, Schoenahl C, Laedlein D.
    Journal: J Radiol; 1987 Mar; 68(3):219-23. PubMed ID: 3298638.
    Abstract:
    The authors report the progressive disappearing of the sonographical image of a previously visualized kidney in a case of emphysematous pyelonephritis. They have called the sonographic vanishing kidney "the sign of the Deaf Kidney". The non-visualisation of a kidney with advanced emphysematous pyelonephritis is due to the infiltration of the perirenal environment by a gas envelope and the filling of the excretory cavities by gas. The perirenal gas-bag forms a shield against ultrasonic waves. The sonographer must be aware of the eventuality of not being able to individualize a renal structure when wrapped in gas. He must then ask for a zonography of the renal area in order to confirm the gas-containing collection in the kidney.
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