Retroperitonealt rum är en anatomisk term som refererar till det område bakom bukhinnan (peritoneum) där också flera vitala organsystem finns placerade, såsom levern, magsäcken, nedre delen av tarmarna, urinblåsan och bägge njurarna. Det retroperitoneala rummet kan delas in i flera kompartment eller fascier, inklusive parietal fascia, visceral fascia och prevertebralt fascia, vilka hjälper till att hålla organen på plats och skydda dem.

"Retroperitoneal tumors" refer to abnormal growths that develop in the retroperitoneal space, which is the area behind the peritoneum (the membrane lining the abdominal cavity) and contains structures such as the kidneys, adrenal glands, pancreas, aorta, and lymphatic vessels. These tumors can be benign or malignant and can arise from various tissues in the retroperitoneal space, including nerves, blood vessels, fat, and connective tissue. They can cause various symptoms depending on their size and location, such as abdominal pain, bloating, or constitutional symptoms like weight loss and fever. Early detection and appropriate treatment are crucial for improving outcomes.

Retroperitoneal fibrosis is a rare and progressive condition characterized by the abnormal growth of fibrous tissue in the retroperitoneal space, which is the area behind the peritoneum (the lining that covers the abdominal cavity). This fibrous tissue can encase and compress vital structures such as the ureters, blood vessels, and nerves, leading to various symptoms. The cause of retroperitoneal fibrosis is often idiopathic, but it can also be associated with certain medical conditions or medications. Treatment typically involves a combination of medication (such as corticosteroids and immunosuppressants) and surgical intervention to relieve the compression on affected structures.

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