Bài viết nêu lên các đặc điểm hình ảnh của UNBTK SPM ở trẻ em trên CLVT. Đánh giá độ nhạy, độ đặc hiệu, giá trị dương tính, giá trị âm tính, độ chính xác của CLVT trong chẩn đoán xác định UNBTK SPM và đánh giá sự lan tràn của bệnh. | ĐẶC ĐIỂM HÌNH ẢNH VÀ GIÁ TRỊ NGHIÊN CỨU KHOA HỌC CẮT LỚP VI TÍNH TRONG BỆNH LÝ U NGUYÊN BÀO THẦN KINH SAU PHÚC MẠC Scientific research Radiographic features and accuracy of CT in diagnosis and evaluation of the dissemination of retroperitoneal neuroblastoma in children Lê Thị Kim Ngọc Nguyễn Duy Huề summary Purpose This study aims to characterize radiographic features on CT of retroperitoneal neuroblastoma. Evaluate Se. Sp. PPV. NPV. Ac. of CT in diagnosis of retroperitoneal neuroblastoma and dissemination of the disease. Materials and Method 111 children with 112 retroperitoneal tumors were enrolled in a prospective study. Abdominal CT findings of all the patients were analyzed correlated with clinical laboratory data results of biopsy and surgical findings in order to assess sensitivity specificity and accuracy values of CT in diagnosis and evaluation of tumor extent Result Radiographic features of retroperitoneal neuroblastoma on CT lobulated ill-defined uncapsulated calcified mass with mild or moderate heterogeneous enhancement and vessel encasement. Among these signs lobulated ill-defined and vessel-encasement are the most valuable Ac. 72-81 . The other signs have low to medium Se. Sp. Ac in diagnostic value 52 -96 and should be combined with the former. CT is good at evaluating the tumor extent renal invasion gt 94 vessel encasement 100 abdominal- organ invasion gt 75 retroperitoneal lymphadenopathy gt 85 except for detecting peritoneal fluid Se. 36 Conclusion Radiographic features of retroperitoneal neuroblastoma on CT lobulated ill-defined uncapsulated calcified with mild or moderate heterogeneous enhancement and vessel-encased. Among them lobulated ill-defined vessel- encasement are the most valuable signs. We should combine signs to increase accuracy of diagnosis. For evaluation of tumor extent CT have high sensitivity specificity and accuracy except for detecting peritoneal fluid. Abbreviation CT Computed Tomography Se Sensitive Sp Specificity PPV .
