Primary Cystic Lesions of the Retrorectal Space: MRI Evaluation and Clinical Assessment
| Autor: | W. Rudolph Schouten, Roy S. Dwarkasing, Sylvia I Verschuuren, Geert J.L.H. van Leenders, Loes M M Braun, Gabriel P. Krestin |
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| Přispěvatelé: | Radiology & Nuclear Medicine, Pathology, Surgery |
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Rectal diseases 030218 nuclear medicine & medical imaging Young Adult 03 medical and health sciences Cystic lesion 0302 clinical medicine Humans Medicine Radiology Nuclear Medicine and imaging Cyst Aged Retrospective Studies medicine.diagnostic_test Cysts Rectal Neoplasms business.industry Magnetic resonance imaging Retrospective cohort study General Medicine Middle Aged medicine.disease Magnetic Resonance Imaging Rectal Diseases 030220 oncology & carcinogenesis Female Radiology business |
| Zdroj: | American Journal of Roentgenology, 209(4), 790-796. American Roentgen Ray Society |
| ISSN: | 1546-3141 0361-803X |
| Popis: | The purpose of this study was to assess the a priori chance that primary cystic lesions of the retrorectal space are malignant and to investigate MRI characteristics that indicate malignancy.Patients referred to a center for colorectal surgery were recruited from 2000 to 2014. Lesions were proven by clinical assessment and histopathology. MRI was performed at 1.5 T with examinations evaluated by two radiologists. Interobserver agreement was assessed (Cohen kappa) and differences between malignant and benign lesions calculated (Fisher exact test).Twenty-eight patients (22 women, six men; age range, 18-70 years) with 31 lesions were included. Lesions were categorized as tailgut cysts (n = 16, 52%), teratomas (n = 9, 29%), lesions of colorectal origin (n = 4, 13%), or neurogenic lesions (n = 2, 6%). Five patients (18%) had malignant lesions. Colorectal lesions had the highest percentage of malignancy (3/4, 75%). A solid tissue component was found in all five (100%) malignant lesions and two (8%) of the benign lesions, which were both teratomas (p0.05). Sensitivity and specificity for malignancy according to the presence of a solid tissue component was 100% (5/5) and 92% (24/26). For unilocularity, multilocularity, debris, septa, and wall thickening, differences were not significant. Interobserver agreement was excellent (κ = 1) for all characteristics except debris (κ = 0.795).The majority of retrorectal cystic lesions are benign. The presence of a solid tissue component should raise suspicion for malignancy. |
| Databáze: | OpenAIRE |
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