mesocolon

Sometimes the peritoneum completely invests it, and forms a distinct but narrow mesocolon.

Transverse mesocolon is a derivative of dorsal mesentery in the embryo.

Lymphadenectomy is usually performed through excision of the fatty tissue adjacent to these vessels (mesocolon), in operations for colon cancer.

The sigmoid mesocolon is the fold of peritoneum which retains the sigmoid colon in connection with the pelvic wall.

A retrocolic hernia is a medical condition consisting of the entrapment of portions of the small intestine behind the mesocolon.

On the posterior side, the transverse colon is connected to the posterior abdominal wall by a mesentery known as the transverse mesocolon.

It arises just below the pancreas, and, passing inferiorly and anteriorly between the layers of the transverse mesocolon, divides into two branches: right and left.

The transverse mesocolon is a broad, meso-fold of peritoneum, which connects the transverse colon to the posterior wall of the abdomen.

Together, the mesentery and mesocolon hold the intestines loosely in place, allowing movement as muscular contractions mix and move the luminal contents along the gastrointestinal tract.

In the male, the peritoneum encircles the sigmoid colon, from which it is reflected to the posterior wall of the pelvis as a fold, the sigmoid mesocolon.

In the region of the duodenum, it forms the dorsal mesoduodenum; and in the region of the colon, it forms the dorsal mesocolon.

These include the Pancreas, Spleen, Left Kidney, Left Suprarenal gland, Transverse colon and its mesocolon, and the diaphragm.

It is almost completely invested by peritoneum, and is connected to the inferior border of the pancreas by a large and wide duplicature of that membrane, the transverse mesocolon.

The structures in the abdomen are classified as intraperitoneal, retroperitoneal or infraperitoneal depending on whether they are covered with visceral peritoneum and whether they are attached by mesenteries (mensentery, mesocolon).

The lower part of the right half, below the transverse colon, is covered by peritoneum continuous with the inferior layer of the transverse mesocolon, and is in contact with the coils of the small intestine.

The mesocolic lymph nodes are numerous, and lie between the layers of the transverse mesocolon, in close relation to the transverse colon; they are best developed in the neighborhood of the right and left colic flexures.

The ascending branch crosses in front of the left kidney and ends, between the two layers of the transverse mesocolon, by anastomosing with the middle colic artery; the descending branch anastomoses with the highest sigmoid artery.

The three most important mesenteries are mesentery for the small intestine, the transverse mesocolon, which attaches the back portion of the colon to the abdominal wall, and the mesosigmoid which enfolds the sigmoid portion of the colon.

The portion of mesentery attached to the greater curvature of the stomach is named the dorsal mesentery (or dorsal mesogastrium, when referring to the portion at the stomach), and the part which suspends the colon is termed the mesocolon.

The anterior margin of pancreas separates the anterior from the inferior surface of the pancreas, and along this border the two layers of the transverse mesocolon diverge from one another; one passing upward over the anterior surface, the other backward over the inferior surface.