Peri aortic lymph nodes(shortened –Para aortic node ,PALN,PAN) are a grop of lymph nodes located in retroperitoneum located across the stomach aorta & adjoining inferior vena cava.It has an anatomical location anterior to the left lumbar trunk 1 .They’re current caudal & cephaloid in postion to left renal vein which drains in the end to the cysterna chylli 2-4 . These group of lymph nodes drain the big bowel ,gonads ,construction creating from mullerian system & different somatic buildings of that space.Understanding the surgical anatomy of this space is critical for the oncosurgeons working in & round this space.In latest time the significance of this space progressively growing to be understood in higher means as extra quantity are of surgeons are working in & round this space as a consequence of growing incidence of ovarian carcinoma & endometrial carcinoma.PALN dissection is an integral a part of cytoreductive surgical procedure & surgical staging procedduree of ovarian & endometrial carcinoma respectively. These nodes could be broadly categorized into supra renal & infra renal contemplating their cephaloid & caudal place in relation to renal vein .Infra renal PALN are of significance to gynaecological cancers. For higher understanding of surgical anatomy, execution of surgical method & relying on drainage sample infra renal PALN are additional categorized as detailed under –Classification of Lumbar group of LN –
1-Left –
Para aortic (lateral)
Pre aortic
Retro aortic
2-Proper –
Para caval
Precaval
Retrocaval
3-Intermediate –Aorto caval
A lot of the efferent vessels from the paraaortic nodes converge to type the suitable and left lumbar trunks which be a part of the cisterna chyli, however some enter the preaortic and retroaortic lymph nodes, and others pierce the crura of the diaphragm to affix the decrease finish of the thoracic duct.
