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The nubbin sign on computed tomography and sonography.
D Blair1, C Rigsby, A T Rosenfield
1Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT 06510.
Urologic Radiology
|January 1, 1987
Summary
The nubbin sign, a kidney's lower pole parenchyma loss, can mimic a mass. Computed tomography (CT) effectively diagnoses this condition, while sonography alone may prove insufficient.
Area of Science:
- Radiology
- Medical Imaging
- Urology
Background:
- Renal duplication anomalies are congenital conditions affecting the urinary tract.
- The "nubbin sign" describes a specific finding in certain renal anomalies.
Observation:
- Parenchymal loss in the lower pole of a duplicated kidney can resemble a renal mass on urography.
- This appearance is termed the "nubbin sign".
Findings:
- Computed tomography (CT) provides definitive diagnostic capabilities for the nubbin sign.
- Sonography alone may present diagnostic challenges in identifying this entity.
Implications:
- Accurate diagnosis of the nubbin sign is crucial for appropriate patient management.
- CT imaging is recommended for confirming the diagnosis when the nubbin sign is suspected.