Related Experiment Video
Updated: Mar 2, 2026

Robot-assisted Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection for Locally Advanced Middle-low Rectal Cancer
Published on: February 12, 2022
MO-A-217A-02: Prostate and Pelvic Lymph Node Anatomy for Contouring
1University of California, San Francisco, San Francisco, CA.
Abstract:
Three-dimensional image guided radiotherapy requires familiarity with axial anatomy of human body to facilitate accurate contouring of target volume for radiotherapy treatment planning. In this session we will review the axial anatomy of male pelvis using images from the visible human project. There will be a review of the literature on how the contour guidelines were formulated and their clinical application on a CT image set.
Learning Objectives:
1. Know the common anatomical landmarks in pelvis used for contouring. 2. Know the contouring guidelines used in published contouring atlas. 3. Know how to use the contouring guidelines in the clinic.
Related Concept Videos
Detailed Structure and Function of Lymph Nodes
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
Abdominal Regions and Quadrants
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four...

