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Congress: ECR25
Poster Number: C-18157
Type: Poster: EPOS Radiologist (educational)
DOI: 10.26044/ecr2025/C-18157
Authorblock: D. G. Margalin, C. Medar, G-A. Popa, O. M. Petrisor; Bucuresti/RO
Disclosures:
Dragos Gabriel Margalin: Nothing to disclose
Cosmin Medar: Nothing to disclose
Gelu-Adrian Popa: Nothing to disclose
Otilia Mihaela Petrisor: Nothing to disclose
Keywords: Retroperitoneum, CT, Computer Applications-Detection, diagnosis, Contrast agent-intravenous, Haemorrhage, Lymphoma, Neoplasia
Learning objectives This study aims to present a case-based approach to the differential diagnosis of perinephric masses, focusing on key imaging findings and distinguishing features using cross-sectional imaging modalities.
Read more Background A comprehensive literature review was performed and supplemented with cases from our hospitals. These cases included both non-contrast-enhanced CT (NECT) and contrast-enhanced CT (CECT) scans. Imaging features of various perinephric pathologies, such as renal cell carcinoma, lymphoma, retroperitoneal sarcomas, abscesses, hematomas, and urinomas, were analyzed and compared for accurate differential diagnosis. 
Read more Findings and procedure details The perirenal space, or perinephric space, is the largest of the three divisions of the retroperitoneum, bounded by the anterior and posterior renal fascia, which separate it from the anterior and posterior pararenal spaces. It encompasses the kidneys, adrenal glands, perinephric fat, proximal ureters, renal vessels, and lymphatics. [1] [fig 1] [fig 2] The first step in evaluating perinephric masses is determining the anatomical origin of the lesion, which can sometimes be obscured in cases of large, invasive lesions.Diseases of the perirenal space often originate...
Read more Conclusion Establishing an imaging diagnosis for perinephric masses can be challenging due to the diverse range of potential pathologies. Determining the anatomical origin, lesion composition, pattern of enhancement and involvement of surrounding structures is essential for narrowing down the differential diagnosis. When interpreted alongside clinical history and laboratory findings, these imaging hallmarks provide a comprehensive framework for accurate diagnosis and differentiation between a broad spectrum of perinephric etiologies.
Read more References  [1] Bryan R. Foster, Ghaneh Fananapazir (2021) Diagnostic Imaging: Genitourinary 4th Edition[2] Bahadoram S, Davoodi M, Hassanzadeh S, Bahadoram M, Barahman M, Mafakher L. Renal cell carcinoma: an overview of the epidemiology, diagnosis, and treatment. G Ital Nefrol. 2022 Jun 20;39(3):2022-vol3. PMID: 35819037.[3] Nicolau C, Antunes N, Paño B, Sebastia C. Imaging Characterization of Renal Masses. Medicina (Kaunas). 2021 Jan 8;57(1):51. doi: 10.3390/medicina57010051. PMID: 33435540; PMCID: PMC7827903.[4] Nguyen T, Gupta A, Bhatt S. Multimodality imaging of renal lymphoma and its...
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