Sacral nodes sit on the sacral promontory lateral to the sacrum, draining pelvic viscera and rectum.
Sacral lymph nodes are a group of deep pelvic lymph nodes located along the anterior surface of the sacrum. They lie in close association with the middle sacral vessels and are part of the posterior pelvic lymphatic drainage network. Though smaller and less numerous than other pelvic nodes, they play an important role in receiving lymph from posterior pelvic organs and the lower rectum. They also serve as a communication point between internal iliac and lateral lumbar lymphatic pathways.
Sacral nodes are typically small, rounded, and embedded in connective tissue along the midline of the posterior pelvic cavity. They consist of the typical lymph node architecture, including a fibrous capsule, subcapsular sinus, cortex with lymphoid follicles, and a medullary core.
The sacral lymph nodes are located in the presacral space of the pelvis. They lie posterior to the rectum and anterior to the sacrum, near the origins of the sacral nerves and middle sacral vessels.
Direction | Related Structures |
---|---|
Anterior | Rectum and mesorectal fascia |
Posterior | Anterior surface of the sacrum |
Superior | Common iliac nodes |
Inferior | Continuation toward lateral sacral and coccygeal tissues |