{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T04:10:11Z","timestamp":1751343011754,"version":"3.41.0"},"reference-count":14,"publisher":"Scientific Scholar","content-domain":{"domain":["indianjnephrol.org"],"crossmark-restriction":true},"short-container-title":["Indian J Nephrol"],"abstract":"<jats:sec>\n<jats:title>Background:<\/jats:title>\n<jats:p>Kidney biopsy or contrast studies are required to diagnose acute renal cortical necrosis (RCN). Both procedures may be potentially delayed in the postpartum setting. Contrast-enhanced ultrasound (CEUS) is a potential alternative for these patients but remains limited in availability. Due to sparse literature and the rarity of RCN, the role of conventional B-mode ultrasound (USG) in diagnosing RCN remains unexplored.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Materials and Methods:<\/jats:title>\n<jats:p>This retrospective study involved postpartum patients with RCN who underwent kidney biopsy at a tertiary care center. Medical records and B-mode USG kidney images of all 23 patients with postpartum RCN over the past 24 months were retrieved. Gray-scale B-mode USG images of the kidney were assessed for size, presence of sonographic hypoechoic rim, USG kidney timing, echogenicity, and cortico-medullary differentiation.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Results:<\/jats:title>\n<jats:p>Among the 23 patients, sonographic hypoechoic rim was observed in 6 patients (26.1%). USG kidney timing ranged from 1.1 to 8 weeks, and kidney length varied from 9.0 to 10.8 cm. There were significant differences in mean USG kidney timing and mean kidney length between patients with and without hypoechoic rim (<jats:italic>P<\/jats:italic>= 0.020 and <jats:italic>P<\/jats:italic>= 0.036, respectively). The mean USG kidney timing was notably earlier in patients with sonographic rim signs than those without sonographic rim signs (2.5 \u00b1 0.77 weeks and 4.81 \u00b1 2.17 weeks, respectively).<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Conclusion:<\/jats:title>\n<jats:p>Despite its lower sensitivity, the sonographic rim sign is an important diagnostic feature of postpartum renal cortical necrosis. In point-of-care ultrasonography, it should be looked for early in the disease course, especially in cases of postpartum anuric acute kidney injury.<\/jats:p>\n<\/jats:sec>","DOI":"10.25259\/ijn_244_2024","type":"journal-article","created":{"date-parts":[[2024,9,5]],"date-time":"2024-09-05T06:24:40Z","timestamp":1725517480000},"page":"520-523","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Sono-graphic Rim Sign in Postpartum Renal Cortical Necrosis: Experience at a Tertiary Care Centre"],"prefix":"10.25259","volume":"35","author":[{"given":"Adarsh","family":"Kumar","sequence":"first","affiliation":[{"name":"Department of Nephrology, VMMC & Safdarjung Hospital, Ansari Nagar East, New Delhi, Delhi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Meenakshi","family":"Rajput","sequence":"additional","affiliation":[{"name":"Department of Obstetrics & Gynecology, VMMC & Safdarjung Hospital, Ansari Nagar East, New Delhi, Delhi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rajesh","family":"Kumar","sequence":"additional","affiliation":[{"name":"Department of Nephrology, VMMC & Safdarjung Hospital, Ansari Nagar East, New Delhi, Delhi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sanjiv","family":"Mahajan","sequence":"additional","affiliation":[{"name":"Department of Nephrology, VMMC & Safdarjung Hospital, Ansari Nagar East, New Delhi, Delhi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chirag","family":"Jain","sequence":"additional","affiliation":[{"name":"Department of Radiology, VMMC & Safdarjung Hospital, Ansari Nagar East, New Delhi, Delhi, 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