ĐẶC ĐIỂM HÌNH ẢNH HỌC VÀ GIÁ TRỊ CỦA CHỤP CẮT LỚP VI TÍNH NGỰC CÓ TIÊM THUỐC CẢN QUANG TRONG CHẨN ĐOÁN KHỐI U PHỔI NGHI NGỜ ÁC TÍNH TẠI BỆNH VIỆN UNG BƯỚU THÀNH PHỐ CẦN THƠ NĂM 2024-2025

Abstract

Background: Lung cancer is a prevalent malignancy with a high incidence in developing countries. Contrast-enhanced computed tomography (CT) is a routine and effective imaging technique for screening high-risk individuals. Objective: To describe the imaging characteristics and evaluate the diagnostic value of contrast-enhanced CT in patients with suspected malignant lung tumors. Materials and methods: A prospective descriptive study was conducted on 80 patients with suspected malignant lung tumors at Can Tho Oncology Hospital. Results: Lung tumors were predominantly located in the right upper lobe (31.3%), left lower lobe (22.5%), and right lower lobe (17.5%), with 93.8% in peripheral regions. Solitary tumors accounted for 91.3%, mostly presenting as ground-glass opacities (76.3%) and partially solid lesions (83.8%). Tumors >7 cm comprised 37.5%, with multilobulated (52.5%) and spiculated margins (35%) being predominant. Calcification was observed in 95% of cases, mainly eccentric (35.5%). Strong contrast enhancement (≥15 HU) occurred in 63.7% of cases, with lymph node metastasis in 17.5%, pleural/interlobar fissure retraction in 55%, and necrosis in 18.8%. Contrast-enhanced CT identified 86.3% of cases as suspicious for malignancy, with high sensitivity (93.5%) but low specificity (23.5%) and moderate accuracy (63.7%). Conclusion: Contrast-enhanced CT demonstrates high sensitivity in screening for suspected malignant lung tumors; however, supplementary methods such as biopsy are necessary to improve specificity and diagnostic accuracy.