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Nakamata A, Matsuki M, Watanabe Y, Kobayashi R, Fujii N, Kunitomo N, Otake Y, Fujii H, Hamamoto K, Mori H. Imaging Features of Uncommon Entities That Manifest with Torsion. Radiographics 2024; 44:e230101. [PMID: 38870044 DOI: 10.1148/rg.230101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Torsion is the twisting of an object along the axis, and various structures (organs and tumors) in the body can twist. Torsion causes initial lymphatic and venous outflow obstruction, leading to congestive edema, enlargement, venous hemorrhagic infarction, and surrounding edema. It can also cause subsequent arterial obstruction depending on the degree of torsion, leading to ischemia, infarction, necrosis, gangrene, and surrounding inflammation. Therefore, in several cases of torsion, immediate surgical intervention is required to improve blood flow and prevent serious complications. Clinical manifestations of torsion are often nonspecific and can affect individuals of varying ages and sex. Imaging plays an important role in the early diagnosis and management of torsion. Multiple imaging modalities, including US, radiography, CT, and MRI, are used to evaluate torsion, and each modality has its specific characteristics. The imaging findings reflect the pathophysiologic mechanism: a twisted pedicle (whirlpool sign), enlargement of the torsed structures, reduced blood flow, internal heterogeneity, and surrounding reactive changes. The whirlpool sign is a definitive characteristic of torsion. In some cases, despite poor internal enhancement, capsular enhancement is observed on contrast-enhanced CT and MR images and is considered to be associated with preserved capsular arterial flow or capsular neovascularization due to inflammation. Radiologists should be familiar with the pathophysiologic mechanisms, clinical characteristics, and imaging characteristics of torsion in various structures in the body. Since other articles about common organ torsions already exist, the authors of this article focus on the uncommon entities that manifest with torsion. ©RSNA, 2024.
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Affiliation(s)
- Akihiro Nakamata
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Mitsuru Matsuki
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Yuriko Watanabe
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Ryoma Kobayashi
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Nana Fujii
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Naoki Kunitomo
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Yuko Otake
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Hiroyuki Fujii
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Kohei Hamamoto
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
| | - Harushi Mori
- From the Department of Radiology, Jichi Medical University School of Medicine, Tochigi, Japan (A.N., Y.W., R.K., N.F., N.K. Y.O., H.F., K.H., H.M.); and Department of Pediatric Radiology, Jichi Children's Medical Center, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan (M.M.)
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Whitesell RT, Brunner JF, Collins HR, Sheafor DH. Qualitative and quantitative spermatic cord abnormalities at CT predict symptomatic scrotal pathology. Abdom Radiol (NY) 2024; 49:2049-2059. [PMID: 38517545 PMCID: PMC11213788 DOI: 10.1007/s00261-024-04251-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/10/2024] [Accepted: 02/12/2024] [Indexed: 03/24/2024]
Abstract
PURPOSE To evaluate quantitative and qualitative spermatic cord CT abnormalities and presence of unilateral or bilateral symptomatic scrotal pathology (SSP) at ultrasound. METHODS This retrospective study included 122 male patients (mean age 47.8 years) undergoing scrotal ultrasound within 24 h of contrast-enhanced CT (n = 85), non-contrast CT (NECT, n = 32) or CT-Urogram (n = 5). CECT quantitative analysis assessed differential cord enhancement using maximum Hounsfield unit measurements. Three fellowship trained body radiologists independently assessed qualitative cord abnormalities for both CECT and NECT. Qualitative and quantitative findings were compared with the presence of SSP. Reader performance, interobserver agreement and reader confidence were assessed for NECT and CECT. Quantitative cutoff points were identified which maximized accuracy, specificity, negative predictive value, and other measures. RESULTS SSP was present in 36/122 patients (29.5%). Positive cases were unilateral in 30 (83.3%) and bilateral in 6 (16.6%). At quantitative assessment, 25% differential cord enhancement had the highest diagnostic accuracy (88.9%), with 90.5% positive predictive value, 88.4% negative predictive value, 96.8% specificity, and 70.4% sensitivity. At qualitative evaluation, CECT reader performance was excellent (aggregate AUC = 0.86; P < .001); NECT was poorly discriminatory, although remained significant (aggregate AUC = 0.67; P = .002). Readers had significantly higher confidence levels with CECT (P < .001). Qualitative inter-observer agreement was high for both CECT and NECT (ICC = 0.981 and 0.963, respectively). CONCLUSION Simple quantitative assessment of differential cord enhancement is highly accurate and specific for SSP at CECT. Qualitative abnormalities at CECT and NECT are also both predictors of SSP, however, CECT significantly out-performs non-contrast exams.
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Affiliation(s)
| | - John F Brunner
- Midwest Radiology, 2355 Highway 36 West, Roseville, MN, USA
| | - Heather R Collins
- Department of Radiology, Medical University of South Carolina, Charleston, SC, USA
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Yang TW, Tsuei YW, Kao CC, Kuo WH, Chen YL, Lin YY. Torsion of a Giant Antimesenteric Lipoma of the Ileum: A Rare Cause of Acute Abdominal Pain. AMERICAN JOURNAL OF CASE REPORTS 2017; 18:589-592. [PMID: 28550278 PMCID: PMC5455808 DOI: 10.12659/ajcr.903574] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Patient: Male, 67 Final Diagnosis: Torsion of a giant antimesenteric lipoma of the ileum Symptoms: Acute abdomen Medication: — Clinical Procedure: En bloc segmental resection with end-to-end anastomosis Specialty: Surgery
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Affiliation(s)
- Ta-Wei Yang
- Department of Emergency Medicine, Taoyuan Armed Forces General Hospital, National Defense Medical Center, Taoyuan, Taiwan
| | - Yi-Wei Tsuei
- Department of Emergency Medicine, Taoyuan Armed Forces General Hospital, National Defense Medical Center, Taoyuan, Taiwan
| | - Chung-Cheng Kao
- Department of Emergency Medicine, Taoyuan Armed Forces General Hospital, National Defense Medical Center, Taoyuan, Taiwan
| | - Wen-Hsien Kuo
- Department of Surgery, Taoyuan Armed Forces General Hospital, National Defense Medical Center, Taoyuan, Taiwan
| | - Yan-Lin Chen
- Department of Radiology, Taoyuan Armed Forces General Hospital, National Defense Medical Center, Taoyuan, Taiwan
| | - Yen-Yue Lin
- Department of Emergency Medicine, Taoyuan Armed Forces General Hospital, National Defense Medical Center, Taoyuan, Taiwan
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