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Erschienen in: Abdominal Radiology 5/2019

06.02.2019 | Classics in Abdominal Radiology

The “phantom” calyx

verfasst von: Janardhana Ponnatapura, Raymond B. Dyer

Erschienen in: Abdominal Radiology | Ausgabe 5/2019

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Excerpt

A “phantom” calyx refers to the imaging finding of lack of contrast opacification of a calyx or portion of the collecting system, where one should be, within an otherwise well-opacified pelvicalyceal system [1]. This appearance most often reflects a process that has infiltrated or obliterated the collecting system element [1]. The appearance was initially described on excretory urography (EXU) [1], but it may also be appreciated on retrograde pyelography (Fig. 1), and CT and MR urography (Fig. 2). The phantom calyx may be caused by tumor (especially urothelial carcinoma of the renal pelvis), infection (especially renal tuberculosis), edema from acute pyelonephritis, stricture related to renal calculus disease or trauma, renal ischemia, renal contusion, a congenital anomaly of the collecting system, or technical under filling during a procedure[13].
Literatur
1.
Zurück zum Zitat Brennan RE, Pollack HM (1979) Nonvisualized (“phantom”) renal calyx: causes and radiologic approach to diagnosis. Urol Radiol 1:17–23CrossRefPubMed Brennan RE, Pollack HM (1979) Nonvisualized (“phantom”) renal calyx: causes and radiologic approach to diagnosis. Urol Radiol 1:17–23CrossRefPubMed
2.
Zurück zum Zitat Dyer RB, Chen MY, Zagoria RJ (2004) Classic signs in uroradiology. RadioGraphics 24:S247–S280CrossRefPubMed Dyer RB, Chen MY, Zagoria RJ (2004) Classic signs in uroradiology. RadioGraphics 24:S247–S280CrossRefPubMed
3.
Zurück zum Zitat Browne RF, Meehan CP, Colville J, Power R, Torreggiani WC (2005) Transitional cell carcinoma of the upper urinary tract: spectrum of imaging findings. RadioGraphics 25:1609–1627CrossRefPubMed Browne RF, Meehan CP, Colville J, Power R, Torreggiani WC (2005) Transitional cell carcinoma of the upper urinary tract: spectrum of imaging findings. RadioGraphics 25:1609–1627CrossRefPubMed
Metadaten
Titel
The “phantom” calyx
verfasst von
Janardhana Ponnatapura
Raymond B. Dyer
Publikationsdatum
06.02.2019
Verlag
Springer US
Erschienen in
Abdominal Radiology / Ausgabe 5/2019
Print ISSN: 2366-004X
Elektronische ISSN: 2366-0058
DOI
https://doi.org/10.1007/s00261-019-01917-4

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