ĐẶC ĐIỂM HÌNH ẢNH KHỚP HÁNG CỦA BỆNH NHÂN SINH THIẾT MÀNG HOẠT DỊCH DƯỚI HƯỚNG DẪN SIÊU ÂM

Abstract

Objective: The study was conducted to describe the imaging characteristics of the synovial membrane (SM) of the hip joint on ultrasound (US) and magnetic resonance imaging (MRI) in patients who underwent SM biopsy and to compare the findings with the final diagnosis. Subjects and Methods: This is a retrospective descriptive study on 27 patients with clinically undetermined SM abnormalities who underwent biopsy under US guidance at Hanoi Medical University Hospital from July 2020 to February 2025. The results showed that the average thickness of the SM on US was 5.41 ± 3.23 mm, while on MRI it was 5.70 ± 3.14 mm. Joint effusion was the most common finding, observed in 88.9% of patients via US and 96.3% via MRI. MRI was superior in detecting subchondral bone marrow edema (59.3%), bone erosion (29.6%), and perijoint muscle edema (40.7%). Notably, soft tissue abscesses were only found in cases of septic arthritis (25%) and were absent in other disease groups. Conclusion: US has the advantages of being a simple, real-time imaging method that supports SM biopsy, while MRI provides additional information on bone and soft tissue lesions around the joint. Therefore, combining both methods enhances the diagnostic accuracy of hip joint SM pathology.