Non-visualization of the ovaries on pediatric transabdominal ultrasound with a non-distended bladder: Can adnexal torsion be excluded?
| Autor: | Gerald Guillot, Nathalie Fleming, Anna Karwowska, Maria Esther Perez Trejo, Gali Shapira-Zaltsberg, Elka Miller |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
Torsion Abnormality medicine.medical_specialty Adolescent Ovary Sensitivity and Specificity 030218 nuclear medicine & medical imaging Young Adult 03 medical and health sciences 0302 clinical medicine Adnexa Uteri Interquartile range 030225 pediatrics Humans Medicine Radiology Nuclear Medicine and imaging Child Retrospective Studies Ultrasonography Neuroradiology business.industry Ultrasound Ovarian torsion Infant Retrospective cohort study medicine.disease female genital diseases and pregnancy complications Appendicitis body regions medicine.anatomical_structure Adnexal Diseases Child Preschool Adnexal torsion Pediatrics Perinatology and Child Health Female Radiology business |
| Zdroj: | Pediatric Radiology. 49:1313-1319 |
| ISSN: | 1432-1998 0301-0449 |
| Popis: | The pediatric reproductive organs are optimally imaged with a full bladder. The filling of the bladder, however, often leads to significant delay in diagnosis and can subject the patient to invasive bladder catheterization. As the key imaging feature in ovarian torsion is unilateral ovarian enlargement, we suspected that a torsed ovary is large enough to be visualized even if the bladder is not well distended. The purpose of this study was to retrospectively investigate if clinically suspected adnexal torsion can be excluded based on non-visualization of the ovaries on transabdominal ultrasound (US) with a non-distended bladder in pediatric patients. This retrospective study comprised 349 girls (1–19 years old) between Jan. 1, 2013, and July 30, 2018. Three hundred and forty-one of the girls were referred to transabdominal US to assess for adnexal torsion and/or appendicitis, and the ovaries were initially not visualized on US. Their bladders were subsequently filled and rescanned with a distended bladder showing the ovaries. Ovarian volumes and time between US scans were documented. The ratio of the volume of the larger ovary to the smaller one was calculated. Nine girls had surgically proven adnexal torsion and a preoperative transabdominal US with a non-distended bladder. There was an overlap of one girl between the two groups. The negative predictive value (NPV), positive predictive value (PPV), and sensitivity and specificity for exclusion of adnexal torsion based on non-visualization of the ovaries on US with a non-distended bladder were calculated. One of the girls (1/341) who had a US study done with a non-distended bladder in which the ovaries were not visualized had a positive diagnosis of adnexal torsion. In eight of the nine girls who had surgically proven adnexal torsion, the torted ovary was identified with a non-distended bladder. The NPV and PPV for exclusion of adnexal torsion with a non-distended bladder was 1.0 and 0.8, respectively. The specificity and sensitivity were 99.4% and 88.9%, respectively. The mean and median time difference between the initial scan and the scan after bladder filling was 105.1 min (standard deviation [SD] -65.8) and 89.0 min (interquartile range [IQR]- 59.0, 130.5), respectively. Non-visualization of the ovaries with a non-distended bladder on transabdominal US study can help exclude clinically suspected adnexal torsion, alleviating the need for bladder filling and prolonging the wait time in the emergency department. Inclusion of non-visualization of the ovaries as one of the features in a predictive score for adnexal torsion should be considered. |
| Databáze: | OpenAIRE |
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