The nubbin sign on computed tomography and sonography.
The loss of parenchyma in the lower pole of a kidney with a duplicated collecting system may mimic a mass on urography ("the nubbin sign"). Computed tomographic findings of this entity are diagnostic. The diagnosis may be difficult to make using sonography alone.
Blair
D
D
Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT 06510.
Rigsby
C
C
Rosenfield
A T
AT
D000328:Adult; D005260:Female; D006801:Humans; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology; D012008:Recurrence; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014513:Ureter / Q000002:abnormalities / Q000000981:diagnostic imaging; D014552:Urinary Tract Infections / Q000209:etiology