Background: This study aimed to compare the levels of L5-S1 interspace and the bifurcation of common iliac vessels on simulation images of rectal cancer patients to evaluate the adequacy of superior borders in conventional 2D planning for covering internal iliac vessels.
Materials And Methods: Simulation images of 236 rectal cancer patients who received neoadjuvant chemoradiation and surgery were analyzed. The images were retrieved from the radiation treatment database and included delineations of L5-S1 interspace and common iliac vessel bifurcation. Distances between these landmarks were measured.
Results: Among the 236 patients, the majority had the common iliac artery bifurcation positioned above the L5-S1 interspace. Specifically, 78.3% of patients had the right common iliac bifurcation above L5-S1 interspace, with an average distance of 2.02 cm. For the left common iliac artery, 77.11% of patients had the bifurcation above L5-S1 interspace, with an average distance of 1.99 cm. Notably, there were cases where the bifurcations were not at the same level.
Conclusion: Using the L5-S1 junction as the upper border of the treatment portal may result in missing proximal nodes at risk of metastases. However, further research is needed to determine the significance of failures above the L5-S1 interspace for justifying the inclusion of the common iliac artery bifurcation in the treatment portal.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10547415 | PMC |
| http://dx.doi.org/10.5603/RPOR.a2023.0045 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Vertebral level in pregnancy according to the posterior superior iliac spine: an observational study.
BMC Pregnancy Childbirth
December 2024
Department of Anesthesiology, West China Second University Hospital, Sichuan University, 20#, Section 3 Renmin Nan Road, Chengdu, Sichuan, 610041, PR China.
Background: While the line joining the posterior superior iliac spine (PSIS) intersects a relatively stable sacral vertebra, it does not directly facilitate the localization of lumbar interspace or assist in the positioning for neuraxial anesthesia. Our study aimed to explore the potential of the PSIS line as a reference point and to determine its practical applicability in clinical settings.
Methods: We consecutively enrolled pregnant women with gestational ages ranging from 24 to 38 weeks scheduled for magnetic resonance imaging (MRI) examination.
Spinal Anatomy Ultrasound in Young Infants With Implications for Lumbar Puncture.
Pediatr Emerg Care
March 2025
Department of Pediatrics, Division of Pediatric Emergency Medicine, Monroe Carell Jr. Children's Hospital at Vanderbilt and Vanderbilt University Medical Center, Nashville, TN.
Background: Lumbar puncture (LP) in young infants may challenge clinicians due to the infrequency of the procedure and anatomic variability. The use of ultrasound (US) to characterize young infant spinal anatomy prior to performing an LP may help determine the most favorable site for intervention.
Objectives: 1) Evaluate potential sites for LP in young infants with US at L2/L3 through L5/S1 to determine differences in needle insertion depth (NID), spinal canal width (SCW), and subarachnoid fluid width (SAW).
Comparison of ultrasonographic anatomy of spine in traditional sitting position versus crossed leg position in term pregnancy: A prospective, observational, crossover study.
Indian J Anaesth
November 2023
Department of Radiology, ESIC Medical College, Hyderabad, Telangana, India.
Background And Aims: The traditional sitting position (TSP) and crossed leg sitting position (CLSP) are positions used for neuraxial anaesthesia. This study compared the interspinous space (ISS) distance using ultrasound assessment of the spine in these positions in parturients in term gestation.
Methods: This prospective, observational study involved ultrasonographic spine assessment in 100 parturients in term gestation with them in either TSP or CLSP.
Quantitative anatomical analysis of lumbar interspaces based on 3D CT imaging: optimized segment selection for lumbar puncture in different age groups.
Neuroradiology
March 2024
Department of Neurosurgery, Fujian Medical University Union Hospital, Fujian Institute of Neurosurgery, No. 29 Xinquan Rd, Gulou District, Fuzhou, 350001, Fujian, China.
Background: Optimal lumbar puncture segment selection remains controversial. This study aims to analyze anatomical differences among L3-4, L4-5, and L5-S1 segments across age groups and provide quantitative evidence for optimized selection.
Methods: 80 cases of CT images were collected with patients aged 10-80 years old.
[Usefulness of an Epidural Catheter with a Subcutaneous Port for Locally Advanced Rectal Cancer Pain Which Was Difficult to Manage with Opioids-A Case Report].
Gan To Kagaku Ryoho
November 2023
Dept. of Surgery, Kiryu Kosei General Hospital.
A 56-year-old woman was diagnosed with advanced rectal cancer, with tumor invasion to the sacrum and levator muscle of the anus and multiple lymph node metastasis. After construction of an artificial anus, chemotherapy was started. However, tumor invasion and the cancer pain progressed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!