So in summary you can, and we will go through this specific
lymphatic drainage of the organs in a few slides time
but even if you just take home this kind of
general summary of the lymphatic drainage.
Ultimately everything is going to end up in the
venous system at the junction between the
left internal jugular
and subclavian veins.
And to do that it runs
within the thoracic duct
which is continuous with the cisterna chyli.
We can see the cisterna chyli here
this dilated sac and then
it going to pass up as the internal
sorry, as the thoracic
duct through the thorax.
But we can see that we have these
pre-aortic intestinal lymphatic trunks
and with these are drained the
organs of the gastrointestinal tract
So these are coming from
the GI tract. This specific
pyloric lymph nodes, hepatic
lymph nodes, splenic lymph nodes
pick the organ, workout if
it is foregut, midgut, hindgut
and ultimately it'll pass to that
lymph node around that main
arterial supply. And then we have
the retroperitoneal pelvic organs.
And these pass one way or another
into the lumbar lymphatic trunks.
These run either side of the aorta so
they're known as the para-aortic lymph nodes.
These two converge to form a
cisterna chyli which as we have said
passes ultimately via the thoracic
duct into the venous system.
So we have got a few tables now
which really conserve as
reference for how these
organs give rise to their lymphatic
blood vessels and how they ultimately
end up into the thoracic duct.
So we can see we have got the
stomach passes into a whole series of
lymph nodes associated
with the stomach but
ultimately it passes into
the coeliac lymph nodes.
Duodenum, the jejunum,
the ileum, the ceacum
various parts of the colon,
are all parts of the midgut.
So these will ultimately by
way of their various lymph
nodes, pass into the superior
mesenteric lymph node.
And then the descending and sigmoid colon,
the superior aspect of the rectum will pass
because they are associated with the hindgut,
into the inferior mesenteric lymph nodes.
These will all pass via the intestinal
lymphatic trunks up to the cisterna chyli.
If we carry on looking at the specific organs.
Then organs such as the pancreas
the spleen, the liver and gallbladder. These
are associated primarily with the foregut
with the pancreas. Remember we had a
bit of superior mesenteric blood supply
So these are going to pass to the
respective lymph nodes, coeliac primarily.
As I said little bit superior mesenteric for the
head and the uncinate process of the pancreas.
And these will pass because they are
part of the gastrointestinal tract
to the intestinal lymphatic trunks.
If we then look at the kidneys,
suprarenal glands, ureters
that lie retroperitoneal then the kidneys
will pass to the lumbar lymph nodes.
via some lymphatic vessels.
As will the suprarenal glands.
The ureters along their course,
will drain in as they follow the posterior abdominal
wall and they pass into lumbar lymph nodes;
may be via internal, external, common iliac. But
ultimately passing into the lumbar lymph node.
And these goes onto the
lumbar trunks, quite separate.
These para-aortic lymph
node, quite separate from
Looking at the pelvis, bladder, the
superior part of the bladder
the fundus, maybe slightly different with the
internal iliac. But the ductus deferens the
seminal vesicles, the prostate all
drains into the internal iliac.
The scrotum, as I have mentioned previously,
that is going to drain into the superficial inguinal.
The testes within the scrotum are going to
be different; because of their origin
up near the kidney on
the posterior abdominal wall
the lymphatic drainage was already
established when they were
developing, so went into the
lumbar just like the kidneys.
So even though it's within the scrotum,
it passes to a different lymphatic region.
Superficial inguinal, the external iliac
common iliac and these then form the
lumbar trunk, para-aortic lymph nodes
In the female we have got the
vagina. We have got the uterus.
These pass into internal, external iliac.
These will ultimately go onto the common iliac.
The ovaries and the uterine tubes. Remember the
ovaries took a similar course to the testes
but didn't end up passing
through the inguinal canal
but they did actually migrate down and before
their migration, the lymph was established.
So similar to the testes
they pass into the lumbar.
We then got the rectum,
the inferior part of the
rectum and the superior
part of the anal canal
and these are passing into the internal iliac.
Inferior passes into a separate
lymphatic system. It passes
into the superficial inguinal.
It is associated with the surface of the
skin just like the scrotum. The skin
via the pectinate line, inferior to the pectinate
line drains into a different location.
Ultimately though they all aggregating
to the same place via the external,
common and then into the lumbar trunks.
So you can depending on
how much you need to know,
you can look at the specific lymphatic
drainage for the specific organ.
Or you can understand the retroperitoneal
and subperitoneal pelvic organs
drain into these lumbar.
Whereas organs of the gastrointestinal
tract would drain in
to the intestinal. And that's really
what the conclusion is.