Inferior vena cava anatomic variants

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Imaging description Inferior vena cava (IVC) anomalies reflect an abnormal regression or persistence of the various embryonic veins, and there are numerous variations. In patients with double (right and left) IVC, two oval structures are seen on both sides of the abdominal aorta on axial images (Figures 99.1 and 99.2). There may be significant discrepancy in the size of the two veins. Typically the right and left IVCs join to form a single right IVC at the level of the left renal vein (Figures 99.1 and 99.2). Different from dilated gonadal vein, the left IVC continues caudally to the left common iliac vein (Figure 99.1). Retrocaval ureter is an anomaly related to the development of the inferior vena cava. The proximal right ureter is positioned posterior to the IVC, and then courses to the left of the IVC, and finally crosses anterior to the IVC (Figure 99.2). Hydronephrosis due to ureteral obstruction may occur in patients with retrocaval ureter. In patients with interruption of the IVC with azygos or hemiazygos continuation, the hepatic segment of IVC is absent (Figure 99.3), and the renal segment of IVC receives blood return from both kidneys and passes posterior to the diaphragmatic crus, and enters the thorax as the azygos or hemiazygos vein (Figure 99.3). The hepatic veins drain directly into the right atrium. In these patients, the azygos or hemiazygos vein is dilated (Figure 99.3), reflecting the increased flow through these vessels. Importance IVC anomalies usually are an incidental finding and do not have a clinical significance. However, it may simulate an abnormal structure such as lymphadenopathy or a mass. Before interventional or surgical procedures, such as IVC filter placement, anomalous anatomy of the IVC is important to be recognized. For example, in patients with double IVC, recurrent pulmonary embolism following placement of an IVC filter is possible. Other uncommon types of IVC anomaly include IVC agenesis, right-sided double IVC, and left IVC with left retrocaval ureter. In patients with IVC agenesis, recurrent deep venous thrombosis may occur.

Original languageEnglish (US)
Title of host publicationPearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses
PublisherCambridge University Press
Pages308-311
Number of pages4
ISBN (Electronic)9781139152228
ISBN (Print)9781107023727
DOIs
StatePublished - Jan 1 2015

Fingerprint

Inferior Vena Cava
Retrocaval Ureter
Veins
Vena Cava Filters
Iliac Vein
Kidney
Ureteral Obstruction
Renal Veins
Incidental Findings
Hepatic Veins
Hydronephrosis
Abdominal Aorta
Ureter

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Kawamoto, S. (2015). Inferior vena cava anatomic variants. In Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses (pp. 308-311). Cambridge University Press. https://doi.org/10.1017/CBO9781139152228.100

Inferior vena cava anatomic variants. / Kawamoto, Satomi.

Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses. Cambridge University Press, 2015. p. 308-311.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kawamoto, S 2015, Inferior vena cava anatomic variants. in Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses. Cambridge University Press, pp. 308-311. https://doi.org/10.1017/CBO9781139152228.100
Kawamoto S. Inferior vena cava anatomic variants. In Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses. Cambridge University Press. 2015. p. 308-311 https://doi.org/10.1017/CBO9781139152228.100
Kawamoto, Satomi. / Inferior vena cava anatomic variants. Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses. Cambridge University Press, 2015. pp. 308-311
@inbook{fe245e01f3544991b65a2a4fb8699deb,
title = "Inferior vena cava anatomic variants",
abstract = "Imaging description Inferior vena cava (IVC) anomalies reflect an abnormal regression or persistence of the various embryonic veins, and there are numerous variations. In patients with double (right and left) IVC, two oval structures are seen on both sides of the abdominal aorta on axial images (Figures 99.1 and 99.2). There may be significant discrepancy in the size of the two veins. Typically the right and left IVCs join to form a single right IVC at the level of the left renal vein (Figures 99.1 and 99.2). Different from dilated gonadal vein, the left IVC continues caudally to the left common iliac vein (Figure 99.1). Retrocaval ureter is an anomaly related to the development of the inferior vena cava. The proximal right ureter is positioned posterior to the IVC, and then courses to the left of the IVC, and finally crosses anterior to the IVC (Figure 99.2). Hydronephrosis due to ureteral obstruction may occur in patients with retrocaval ureter. In patients with interruption of the IVC with azygos or hemiazygos continuation, the hepatic segment of IVC is absent (Figure 99.3), and the renal segment of IVC receives blood return from both kidneys and passes posterior to the diaphragmatic crus, and enters the thorax as the azygos or hemiazygos vein (Figure 99.3). The hepatic veins drain directly into the right atrium. In these patients, the azygos or hemiazygos vein is dilated (Figure 99.3), reflecting the increased flow through these vessels. Importance IVC anomalies usually are an incidental finding and do not have a clinical significance. However, it may simulate an abnormal structure such as lymphadenopathy or a mass. Before interventional or surgical procedures, such as IVC filter placement, anomalous anatomy of the IVC is important to be recognized. For example, in patients with double IVC, recurrent pulmonary embolism following placement of an IVC filter is possible. Other uncommon types of IVC anomaly include IVC agenesis, right-sided double IVC, and left IVC with left retrocaval ureter. In patients with IVC agenesis, recurrent deep venous thrombosis may occur.",
author = "Satomi Kawamoto",
year = "2015",
month = "1",
day = "1",
doi = "10.1017/CBO9781139152228.100",
language = "English (US)",
isbn = "9781107023727",
pages = "308--311",
booktitle = "Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses",
publisher = "Cambridge University Press",

}

TY - CHAP

T1 - Inferior vena cava anatomic variants

AU - Kawamoto, Satomi

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Imaging description Inferior vena cava (IVC) anomalies reflect an abnormal regression or persistence of the various embryonic veins, and there are numerous variations. In patients with double (right and left) IVC, two oval structures are seen on both sides of the abdominal aorta on axial images (Figures 99.1 and 99.2). There may be significant discrepancy in the size of the two veins. Typically the right and left IVCs join to form a single right IVC at the level of the left renal vein (Figures 99.1 and 99.2). Different from dilated gonadal vein, the left IVC continues caudally to the left common iliac vein (Figure 99.1). Retrocaval ureter is an anomaly related to the development of the inferior vena cava. The proximal right ureter is positioned posterior to the IVC, and then courses to the left of the IVC, and finally crosses anterior to the IVC (Figure 99.2). Hydronephrosis due to ureteral obstruction may occur in patients with retrocaval ureter. In patients with interruption of the IVC with azygos or hemiazygos continuation, the hepatic segment of IVC is absent (Figure 99.3), and the renal segment of IVC receives blood return from both kidneys and passes posterior to the diaphragmatic crus, and enters the thorax as the azygos or hemiazygos vein (Figure 99.3). The hepatic veins drain directly into the right atrium. In these patients, the azygos or hemiazygos vein is dilated (Figure 99.3), reflecting the increased flow through these vessels. Importance IVC anomalies usually are an incidental finding and do not have a clinical significance. However, it may simulate an abnormal structure such as lymphadenopathy or a mass. Before interventional or surgical procedures, such as IVC filter placement, anomalous anatomy of the IVC is important to be recognized. For example, in patients with double IVC, recurrent pulmonary embolism following placement of an IVC filter is possible. Other uncommon types of IVC anomaly include IVC agenesis, right-sided double IVC, and left IVC with left retrocaval ureter. In patients with IVC agenesis, recurrent deep venous thrombosis may occur.

AB - Imaging description Inferior vena cava (IVC) anomalies reflect an abnormal regression or persistence of the various embryonic veins, and there are numerous variations. In patients with double (right and left) IVC, two oval structures are seen on both sides of the abdominal aorta on axial images (Figures 99.1 and 99.2). There may be significant discrepancy in the size of the two veins. Typically the right and left IVCs join to form a single right IVC at the level of the left renal vein (Figures 99.1 and 99.2). Different from dilated gonadal vein, the left IVC continues caudally to the left common iliac vein (Figure 99.1). Retrocaval ureter is an anomaly related to the development of the inferior vena cava. The proximal right ureter is positioned posterior to the IVC, and then courses to the left of the IVC, and finally crosses anterior to the IVC (Figure 99.2). Hydronephrosis due to ureteral obstruction may occur in patients with retrocaval ureter. In patients with interruption of the IVC with azygos or hemiazygos continuation, the hepatic segment of IVC is absent (Figure 99.3), and the renal segment of IVC receives blood return from both kidneys and passes posterior to the diaphragmatic crus, and enters the thorax as the azygos or hemiazygos vein (Figure 99.3). The hepatic veins drain directly into the right atrium. In these patients, the azygos or hemiazygos vein is dilated (Figure 99.3), reflecting the increased flow through these vessels. Importance IVC anomalies usually are an incidental finding and do not have a clinical significance. However, it may simulate an abnormal structure such as lymphadenopathy or a mass. Before interventional or surgical procedures, such as IVC filter placement, anomalous anatomy of the IVC is important to be recognized. For example, in patients with double IVC, recurrent pulmonary embolism following placement of an IVC filter is possible. Other uncommon types of IVC anomaly include IVC agenesis, right-sided double IVC, and left IVC with left retrocaval ureter. In patients with IVC agenesis, recurrent deep venous thrombosis may occur.

UR - http://www.scopus.com/inward/record.url?scp=84954168454&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84954168454&partnerID=8YFLogxK

U2 - 10.1017/CBO9781139152228.100

DO - 10.1017/CBO9781139152228.100

M3 - Chapter

AN - SCOPUS:84954168454

SN - 9781107023727

SP - 308

EP - 311

BT - Pearls and Pitfalls in Cardiovascular Imaging: Pseudolesions, Artifacts and Other Difficult Diagnoses

PB - Cambridge University Press

ER -