Identification of Ryu's Segmentation of the Liver Using MDCT Analysis

Kaneko, Takahisa; Tomiyama, Takeshi; Kiyuna, Hajime; Machida, T.; Hayashi, Hiromitsu; Kumita, Shin‐ichiro

doi:10.1272/jnms.77.244

Cited by 10 publications

(8 citation statements)

References 1 publication

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“…Based on these reports, Cho et al 12 reported the AFV (V8) as a landmark vein between the ventral and dorsal segments of the anterior section; however, it had variations in the number of veins (a mean of 1.2 branches per patient) and in connecting hepatic vein (RHV or MHV) 11 . Several studies have verified the AFV in patients with normal livers 18‐20 . Kaneko et al 18 reported that the AFV could be identified from S8 to S5 in only 1% of the cases and even after the identification of the AFV, the boundary between the ventral and dorsal parts of the anterior section could not be determined by the AFV.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have verified the AFV in patients with normal livers 18‐20 . Kaneko et al 18 reported that the AFV could be identified from S8 to S5 in only 1% of the cases and even after the identification of the AFV, the boundary between the ventral and dorsal parts of the anterior section could not be determined by the AFV. Taniai et al 19 also reported that the AFV could be identified only in S8 and might not be easily identifiable due to the various branching types.…”

Section: Discussionmentioning

confidence: 99%

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Analysis of right‐sided ligamentum teres: The novel anatomical findings and classification

Terasaki

Yamamoto

Sugiura

et al. 2020

J Hepato Biliary Pancreat

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Right-sided ligamentum teres (RSLT) is a rare congenital anomaly in which the fetal umbilical vein is connected to the right paramedian trunk. It was first described as left-sided gallbladder (LSGB) by Hochstetter et al. 1 This anomaly was initially thought to involve displacement of the gallbladder to the left side of the ligamentum teres (LT), but in 1997, Nagai et al 2 reported that LSGB resulted from anomalous attachment of the LT to the right paramedian trunk. Confusion regarding this anatomy persists due to the thought that the gallbladder position changed in patients with RSLT. A previous report proposed that LSGB occurred owing to ectopic gallbladder attachment to the left lobe of the liver, 3 whereas others suggested that sinistroposition of the gallbladder occurred due to developmental failure of the quadrate lobe. 4 The origin of this anomaly has not been fully explained but confusion has increased with a report of rightsided gallbladder in patients with RSLT. 5 Although we are likely to encounter patients with RSLT because it has an estimated prevalence of around 1%,

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Analysis of right‐sided ligamentum teres: The novel anatomical findings and classification

Terasaki

Yamamoto

Sugiura

et al. 2020

J Hepato Biliary Pancreat

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“…Using state-of-the-art CT scanners, as well as such scanners in association with special software (Hepa-Vision) allows for 3D rendering of vascular and biliary elements down to subsegmental levels (1,(6)(7)(8)(9)(10)(11)(12).…”

Section: Introduction Introductionmentioning

confidence: 99%

“…Several types of surgery based on the vertical bipartition of the right anterior section of the liver (RAS) were performed in recent years, while attempting to perform a series of anatomic resections, liver parenchyma-sparing and useful in cases of HCC and liver metastasis surgery (8,(10)(11)(12)14,(16)(17)(18)(19)(20)(21)(22)(23).…”

Section: Introduction Introductionmentioning

confidence: 99%

“…This plane includes the anterior fissure vein (AFV), also named the intermediate vein (V8i) (49), that we chose to name the anterior intersubsectional vein (AISV). The AISV (V8i) is present in 85%-100% of the cases, and it usually is a vein afferent to MHV (54.4%-83.9% of the cases) and, less frequently, a vein afferent to RHV or the inferior vena cava (IVC) (6,7,10,15,16,49).…”

Section: Introduction Introductionmentioning

confidence: 99%

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Vertical Bipartition of the Right Anterior Section by Extraglissonian Approach

Câmpeanu¹,

Popescu²,

Mosoia³

et al. 2020

SGO

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By positioning the right anterior section (RAS) in the right hemiliver, the classic right hepatectomy (RH), sectionectomy or segmentectomy concept is not always appropriate for this section. Besides the classic Couinaud cranio-caudal division of RAS, there is also a vertical bipartition of RAS in two subsections (ventral and dorsal) based both on the portal systematization of the tertiary Glissonian pedicles' spatial distribution and on the suprahepatic Couinaud systematization. This study discusses the anatomical basis of the extra-Glissonian resections, as well as various types of extra-Glissonian resection involving the two RAS subsections and sparing liver parenchyma.

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Study on the Segmentation of the Right Posterior Sector of the Liver

et al. 2019

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Background The border between segments VI and VII of the right posterior sector of the liver is controversial owing to lack of anatomical landmarks. This study aimed to examine the segmentation of the right posterior sector. Methods Using three‐dimensional software, ramification type of the right posterior portal vein (RPPV) was analysed in 100 patients. Results A bow‐shaped anatomy, in which the RPPV exhibits a downward convex bow shape with several ramifications, was found in 50 patients. A bifurcation anatomy, in which the RPPV bifurcates into the cranial and caudal branches, was observed in 45 patients. In the bow‐shaped anatomy, setting the segmentation was difficult due to lack of definite landmarks; thus, the downward portal branches were determined as segment VI branches, while horizontal and upward branches were determined as segment VII branches. In the bow‐shaped anatomy, the incidence of full exposure of a thick branch of the right hepatic vein on virtual transection surface was 60.0%, while in the bifurcation anatomy, it was only 11.1%. No relations were observed between RPPV anatomy and main PV/right hepatic vein anatomy. The volumes of segments VI and VII were equal in both the bow‐shaped and bifurcation anatomy. Conclusions The bow‐shaped and bifurcation types are commonly observed in RPPV anatomy. In the bifurcation anatomy, the right posterior sector is divided into segments VI and VII. In the bow‐shaped anatomy, setting the segmentation was difficult, thus it may be compelled to be arbitrarily determined.

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Identification of Ryu's Segmentation of the Liver Using MDCT Analysis

Cited by 10 publications

References 1 publication

Analysis of right‐sided ligamentum teres: The novel anatomical findings and classification

Analysis of right‐sided ligamentum teres: The novel anatomical findings and classification

Vertical Bipartition of the Right Anterior Section by Extraglissonian Approach

Study on the Segmentation of the Right Posterior Sector of the Liver

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