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Mô tả bất thường giải phẫu nửa sau vòng động mạch não trên chụp cắt lớp vi tính

Mô tả bất thường giải phẫu nửa sau vòng động mạch não trên chụp cắt lớp vi tính

06/05/2021 16:04:23 | 0 binh luận

SUMMARY Objective: To describe the anatomical variations in posterior half of the circle of Willis and to determine the rate of the anatomical variability of these arteries. Materials and Methods: We conducted a cross-sectional study in 480 people who were performed CT angiography of the cerebral arteries at the University Medical Center Hospital between January 2019 and December 2020. The blood vessels to be investigated included: posterior communicating arteries, posterior cerebral arteries, basal artery, anterior inferior cerebellar arteries, posterior inferior cerebellar arteries, and the superior cerebellar artery. A radiologist who had more than 5 years of experience of CT brain evaluates these anatomical variations: hypoplasia, aplasia, fetal type, fenestration, duplication, triplication and double origin. Results: The study was composed of 480 people (259 males, 221 females). The mean age of people was 55.7 ± 16.7 years (range, 2 - 102 years). 50 - 69 age group accounts for the majority with 237 people (49.4%). The anatomical variations of posterior communicating artery: unilateral hypoplasia 38.5%, bilateral hypoplasia 19.4%, unilateral aplasia 22.9%, bilateral aplasia 4.0%, fenestration 0.4%. The anatomical variations of posterior cerebral artery: unilateral hypoplasia 10.2%, bilateral hypoplasia 3.5%, unilateral aplasia 8.8%, bilateral aplasia 1.3%, unilateral fetal 17.9%, bilateral fetal 5%. The anatomical variations of basal artery: hypoplasia 5.6%, aplasia 0%, fenestration 0.6%. The anatomical variations of anterior inferior cerebellar artery: unilateral aplasia 30%, bilateral aplasia 10.4%, unilateral duplication 1.3%, bilateral duplication 5.8%, triplication 0.2%. The anatomical variations of posterior inferior cerebellar artery: unilateral aplasia 29%, bilateral aplasia 5.8%, unilateral duplication 0.4%, bilateral duplication 0%, fenestration 0.2%, double origin 0.2%. The anatomical variations of the superior cerebellar artery: aplasia 0%, unilateral duplication 11.3%, bilateral duplication 2.9%, triplication 1.7%, double origin 0.4%. Conclusion : The anatomical variations in posterior half of the circle of Willis are common. The most common abnormalities are the fetal type of posterior cerebral artery, hypoplasia or aplasia of the posterior communicating artery, hypoplasia or aplasia anterior and posterior inferior cerebellar artery, and the duplication of the superior cerebellar artery. Keywords: posterior circulatory system, computed tomography, anatomical variations.
U thận trong bệnh cảnh phakomatosis, những điều cần lưu ý: nhân hai trường hợp lâm sàng

U thận trong bệnh cảnh phakomatosis, những điều cần lưu ý: nhân hai trường hợp lâm sàng

05/12/2019 10:06:36 | 0 binh luận

Renal tumors in the Phakomatosis disease, what to note: two case report SUMMARY Phakomatosis are a group of neurocutaneous disorders characterised by involvement of structures that arise from the embryonic ectoderm , consist of central nervous system, skin ,eyes and others: kidney, heart, lung… In this article we focus on the incidence of renal tumors in Tuberous sclerosis, one of the common diseases in Phakomatosis. Tuberous sclerosis is a rare neurocutaneous disorder (phakomatosis) characterized by the development of multiple benign tumours in various organs, including the kidneys. Tuberous sclerosis complex has several renal manifestations including angiomyolipomas (AML) and renal epithelial neoplasms. Angiomyolipomas is found in 40% of patients with tuberous sclerosis, and its most common complication is ruptures due to aneurysms. We present two cases was diagnosed with bilateral angiomyolipomas in tuberculosis and emphasizes the importance of the diagnosis and choice of appropriate treatment for each patient. Key words : Phakomatosis, renal tumor
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