Analysis on the features and relationship of falciform ligament&nbsp; pseudo lesions and drainage veins by MSCT

doi:10.13418/j.issn.1001-165x.2023.6.05

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Chinese Journal of Clinical Anatomy ›› 2023, Vol. 41 ›› Issue (6) : 657-661. DOI: 10.13418/j.issn.1001-165x.2023.6.05

Analysis on the features and relationship of falciform ligament pseudo lesions and drainage veins by MSCT

Zhang Haitao¹, Bai Jinsong¹, Shu Shengjie², Zhang Chi¹, Li Hongying¹, Zhang Guohua¹, Song Ruixiang¹, Zhu Wei¹

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Abstract

Objective To discuss the MSCT findings of falciform ligament pseudo-lesion (FLP) and drainage veins, and to explore the relationship between them. Methods An each of 96 patients who received plain and enhanced CT scans in our hospital from October 2021 to October 2022 were retrospectively collected. The main evaluation indicators were image findings and features of FLP and drainage vein. The drainage veins of Ⅲ and Ⅳ segments of liver in MSCT were divided into 3 types: type A, have upper branch and lower branch, the upper branch started from the fat area between the diaphragm and the liver and went forward and down into Ⅲ and Ⅳ segments of the liver, the lower branch started from the anterior abdominal wall or the fat area of local abdominal which slightly above the umbilical level, then moved backward and upward into Ⅲ and Ⅳ segments of the liver; Type B, was the same as the upper branch of type A; Type C, was the same as the lower branch of type A. Results The morphology of FLP was mainly wedge-shaped (57.1%, 63.4%) in both plain and enhanced CT images, and the anterior inner edge of Ⅳ segment of the liver was the most common location (93.8%). The highest detection rate of FLP was found in portal vein phase (42.7%). There was statistically significant difference in the detection rate of FLP between plain and enhanced CT (P<0.001), but there was no statistically significant difference in the detection rate of drainage venules in the Ⅲ and Ⅳ segments of liver (P>0.05). There was no significant difference in the detection rate of drainage venules between with and without FLP in plain CT images (P>0.05), but there was significant difference in the detection rate of drainage venules between with and without FLP in enhanced CT images (P<0.001). No drainage vein was observed in 5 cases of FLP in enhanced CT images, meanwhile no FLP was observed in 29 cases which showing drainage venules. Conclusions FLP is easy to distinguish from true lesions by certain CT features. Type C is the most common type of drainage venules in segment Ⅲ and Ⅳ of liver in MSCT. FLP of plain CT scan has no direct correlation with drainage venules, but associated with local histological abnormality of liver. FLP of enhanced CT scan associated with drainage venules, and was affected by both drainage venules and local blood supply of hepatic parenchyma.

Key words

Falciform ligament of the liver; / / Pseudolesion; / / Drainage vein; / / Multi-slice CT / Contrast-enhancement

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Zhang Haitao, Bai Jinsong, Shu Shengjie, Zhang Chi, Li Hongying, Zhang Guohua, Song Ruixiang, Zhu Wei. Analysis on the features and relationship of falciform ligament pseudo lesions and drainage veins by MSCT[J]. Chinese Journal of Clinical Anatomy. 2023, 41(6): 657-661 https://doi.org/10.13418/j.issn.1001-165x.2023.6.05

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