Placental recess accompanied by a T2 dark band: a new finding for diagnosing placental invasion
| Autor: | Tomomi Sato, Fumio Shishido, Keiya Fujimori, Takeshi Shigihara, Naoko Mori, Kazuhiro Tasaki, Osamu Hasegawa |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Pathology medicine.medical_specialty Placenta accreta Urology Uterus Dark band Placenta Accreta Sensitivity and Specificity 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Vascularity Predictive Value of Tests Pregnancy Internal medicine medicine Humans Radiology Nuclear Medicine and imaging Retrospective Studies 030219 obstetrics & reproductive medicine Radiological and Ultrasound Technology medicine.diagnostic_test business.industry Cesarean Section Gastroenterology Magnetic resonance imaging Anatomy Hepatology medicine.disease Magnetic Resonance Imaging Exact test medicine.anatomical_structure Coronal plane Female medicine.symptom business |
| Zdroj: | Abdominal radiology (New York). 42(8) |
| ISSN: | 2366-0058 |
| Popis: | Our aim was to assess the usefulness of a new magnetic resonance imaging (MRI) finding, the placental recess, for diagnosing placental invasion. This retrospective study included 51 patients (mean age 34.1 years, range 26–43 years) with suspected placental invasion who underwent cesarean section. Preoperative MRI was performed using a 1.5-T unit and included axial, sagittal, and coronal T2-weighted imaging (T2WI) with half-Fourier fast spin-echo sequences. Overall, 9 patients showed placental invasion, and 42 did not. Placental recess was defined as a placental deformity with contraction of the placental surface and outer rim of the uterus accompanied by a T2 dark band. Two radiologists independently assessed the presence of the placental recess and conventional findings including uterine bulging, abnormal placental vascularity, placental heterogeneous intensity on T2-weighted imaging (T2WI), and the T2 dark band. Fisher’s two-sided exact test was used to compare findings between patients with and without placental invasion. Interobserver reliability was assessed using the kappa statistic. MRI features had interobserver reliability of >0.40. Placental recess yielded the highest kappa value (0.898). Significant differences were identified between patients with and without placental invasion regarding abnormal placental vascularity, placental heterogeneous intensity, a T2 dark band, and the placental recess on T2WI (p = 0.0282, 0.0003, 0.0003 |
| Databáze: | OpenAIRE |
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