The Hepatic and Splenic Angles

The hepatic and splenic angles, the posterior and inferior contours of these intraperitoneal organs, are out lined normally by the contrast provided by the subjacent extraperitoneal fat.65 Figure 8-39 shows that the lateral aspects of the angles are adjacent to the lateral extension of the posterior pararenal fat, while the medial aspects are related to the anterior pararenal and perirenal fat. Loss of their visualization, however, is a nonlocalizing abnormality. Either intraperitoneal (subhepatic) fluid collections or infiltration within any of the three extra-peritoneal compartments may act as a mass to displace the angle out of the bed of fat.

Fever Unknown Origin

Fig. 8-38. Right posterior pararenal abscess in a patient with fever of unknown origin.

Plain film of the abdomen demonstrates visualization of the psoas muscle margins bilaterally (arrows) except for segmental loss of the lower aspect on the right. Despite multiple contrast studies, this was the sole finding indicating and localizing the underlying infection, which was proved at surgery.

Fig. 8-38. Right posterior pararenal abscess in a patient with fever of unknown origin.

Plain film of the abdomen demonstrates visualization of the psoas muscle margins bilaterally (arrows) except for segmental loss of the lower aspect on the right. Despite multiple contrast studies, this was the sole finding indicating and localizing the underlying infection, which was proved at surgery.

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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