patchy renal vasoconstriction
Spotted
nephrogram • Spotted nephrograms - severe hypotension - Ganzer Fall bei Radiopaedia
Acute renal
failure with loin pain and patchy renal vasoconstriction. Coronal (a, b) arterial-phase images showed normal, symmetric size and thickness of both kidneys, with multiple bilateral wedge-shaped nonenhancing parenchymal regions (thin arrows).
A spotted nephrogram is a descriptive term indicating an appearance of patchy, segmental and subsegmental renal parenchymal enhancement.
Pathology
The pattern is indicative of focal areas of cortical ischemia or necrosis, as a result of small vessel occlusion. This abnormal perfusion pattern can be seen on angiography, as well as contrast enhanced CT and MR imaging.
Recognized causes include :
- renal vasculitis
- necrotizing vasculitis (periarteritis nodosa)
- scleroderma
- hypertensive nephrosclerosis
- renal arterial emboli
- cardiac valvulopathy
- cardiac arrhythmia
- aortic aneurysm
See also
Siehe auch:
Assoziationen und Differentialdiagnosen zu fleckige Nierenkontrastierung:
akutes
Nierenversagen mit Lendenschmerz und fleckiger Vasokonstriktion der Nieren