Renal papillary necrosis CT
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Nasrin Nikravangolsefid, MD-MPH [2]
Overview
CT urography is helpful in the diagnosis of renal papillary necrosis that shows multiple small accumulations of contrast media in the papillary regions near the calyx system.
Key CT Findings in Renal papillary necrosis
- CT urography is helpful in the diagnosis of renal papillary necrosis. [1]
- Normal papillary blush is blushlike hyperattenuated area at excretory phase of CT urography. [1]
- Findings on CT urography suggestive of renal papillary necrosis include multiple small accumulations of contrast media in the papillary regions. [1]
- The lobster claw sign is a diagnostic finding on CT urography in the papillary subtype of renal papillary necrosis that develops due to elongation of the minor calyx fornices following ischemia and destruction of the renal papilla. [2]
- Other diagnostic findings include[3]:
- ball on tee
- signet ring
- sloughed papilla with calyces clubbing
References
- ↑ 1.0 1.1 1.2 Kawamoto S, Duggan P, Sheth S, Miyamoto H, Kazi ZN, Fishman EK (2017). "Renal Papillary and Calyceal Lesions at CT Urography: Genitourinary Imaging". Radiographics. 37 (1): 358–359. doi:10.1148/rg.2017160089. PMID 28076022.
- ↑ Xiang H, Han J, Ridley WE, Ridley LJ (2018). "Lobster claw sign: Renal papillary necrosis". J Med Imaging Radiat Oncol. 62 Suppl 1: 90. doi:10.1111/1754-9485.37_12784. PMID 30309154.
- ↑ "Renal papillary necrosis | Radiology Reference Article | Radiopaedia.org".
- ↑ Case courtesy of Dr Matt A. Morgan, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/40421">rID: 40421</a>
- ↑ Case courtesy of Dr Matt A. Morgan, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/40421">rID: 40421</a>