Perirenal Retroperitoneal Fibrosis

Retroperitoneal fibrosis has multiple causes and consists of abnormal proliferation of fibrous tissue in the retro-peritoneum that may encase the aorta, inferior vena cava, or the ureters.254 The fibrosis may extend laterally to envelop the renal pelvis, invade the perirenal space to surround the kidney, or both. Perirenal involvement by retroperitoneal fibrosis may appear as nodular masses253,255 or as a rind or plaque of fibrous tissue surrounding the kidney.40,256 (Fig. 8-185).

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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