What is a retroperitoneal mass definition?

INTRODUCTION. Retroperitoneal masses constitute a heterogeneous group of lesions, originating in the retroperitoneal spaces, that pose a diagnostic challenge for radiologists(1). The majority of cases are malignant tumors, of which approximately 75% are mesenchymal in origin(2-4).

What is retroperitoneal in biology?

Listen to pronunciation. (REH-troh-PAYR-ih-toh-NEE-ul) Having to do with the area outside or behind the peritoneum (the tissue that lines the abdominal wall and covers most of the organs in the abdomen).

What is retroperitoneum cancer?

What is retroperitoneal sarcoma? Sarcoma is a rare type of cancer that develops from the body’s connective tissues, such as fat, muscle, blood vessels and fibrous tissue. About 20% of sarcomas develop in the back of the abdomen, also known as the retroperitoneum, next to the kidneys.

What is retroperitoneal tumor resection?

Retroperitoneal tumors are lesions with diverse pathological subtypes that originate from the retroperitoneal space; ~40% of these tumors are benign. Due to such lesions often surrounding and associating with vital abdominal blood vessels, a complete surgical resection is difficult.

Why are kidneys called retroperitoneal?

The kidneys are considered “retroperitoneal” organs, which means they sit behind a lining in the abdominal cavity, unlike all other abdominal organs.

What is an example of retroperitoneal organ?

The retroperitoneal space contains the kidneys, adrenal glands, pancreas, nerve roots, lymph nodes, abdominal aorta, and inferior vena cava.

What is a retroperitoneal kidney?

Why are some organs retroperitoneal?

It has no specific delineating anatomical structures. Organs are retroperitoneal if they have peritoneum on their anterior side only. Structures that are not suspended by mesentery in the abdominal cavity and that lie between the parietal peritoneum and abdominal wall are classified as retroperitoneal.

What is the example of retroperitoneal?

Abdominal organs that are not suspended by the mesentery and lie between the abdominal wall and parietal peritoneum are said to lie within the retroperitoneum. Several individual spaces make up the retroperitoneum. These spaces are the anterior pararenal space, posterior pararenal space, and the perirenal space.

What is the difference between retroperitoneal and peritoneal?

The main difference between intraperitoneal and retroperitoneal space is that organs in the intraperitoneal space develop inside the peritoneal cavity, whereas organs in the retroperitoneal space develop outside the peritoneal cavity.