Diagnostic and interventional radiology (Ankara, Turkey) · 2026
Transperineal ultrasonography with a high-frequency probe and a three-dimensional end-fire probe for imaging perianal abscesses and locating the internal openings of anal fistulas.
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Wu Hongyun, Chang Juan, Zhang Xiuhong, Tao Yunfei
Аннотация
PURPOSE: This study aims to explore the clinical value of transperineal ultrasonography with a high-frequency probe and a three-dimensional (3D) end-fire probe in locating the internal openings of perianal abscesses and anal fistulas.
METHODS: Eighty patients who were diagnosed with perianal abscesses and anal fistulas and treated between June 2023 and December 2024 were enrolled in this study. An observation group (n = 40) and a control group (n = 40) were established, and intergroup comparisons were conducted on the diagnostic efficacy of the intervention in locating internal openings and categorizing abscesses according to the Parks classification system.
RESULTS: The two groups showed no significant differences in baseline data (P > 0.05). The observation group showed higher sensitivity, specificity, and overall accuracy in the localization of internal openings than the control group. There was good agreement between the independent image assessments of the two study sonographers (Cohen's kappa = 0.83, P < 0.001). The recurrence rate was 7.5% (3/40) in the observation group and 25.0% (10/40) in the control group at 6 months after surgery. The observation group demonstrated higher accuracy in the categorization of abscesses based on the Parks classification system than the control group (92.5% vs. 77.5%).
CONCLUSION: Transperineal ultrasonography using both a high-frequency probe and a 3D end-fire probe can enhance the accurate localization of the internal openings of perianal abscesses and anal fistulas and assist in the accurate classification of abscesses.
CLINICAL SIGNIFICANCE: The combined dual-probe ultrasonography method is a non-invasive, rapid, and highly accurate preoperative imaging approach that aids in precise surgical planning, reduces postoperative recurrence, and offers a practical diagnostic alternative for institutions without access to magnetic resonance imaging.
METHODS: Eighty patients who were diagnosed with perianal abscesses and anal fistulas and treated between June 2023 and December 2024 were enrolled in this study. An observation group (n = 40) and a control group (n = 40) were established, and intergroup comparisons were conducted on the diagnostic efficacy of the intervention in locating internal openings and categorizing abscesses according to the Parks classification system.
RESULTS: The two groups showed no significant differences in baseline data (P > 0.05). The observation group showed higher sensitivity, specificity, and overall accuracy in the localization of internal openings than the control group. There was good agreement between the independent image assessments of the two study sonographers (Cohen's kappa = 0.83, P < 0.001). The recurrence rate was 7.5% (3/40) in the observation group and 25.0% (10/40) in the control group at 6 months after surgery. The observation group demonstrated higher accuracy in the categorization of abscesses based on the Parks classification system than the control group (92.5% vs. 77.5%).
CONCLUSION: Transperineal ultrasonography using both a high-frequency probe and a 3D end-fire probe can enhance the accurate localization of the internal openings of perianal abscesses and anal fistulas and assist in the accurate classification of abscesses.
CLINICAL SIGNIFICANCE: The combined dual-probe ultrasonography method is a non-invasive, rapid, and highly accurate preoperative imaging approach that aids in precise surgical planning, reduces postoperative recurrence, and offers a practical diagnostic alternative for institutions without access to magnetic resonance imaging.