A right-sided pleural effusion often is present with left-sided heart failure. A bilateral hydrothorax, on the other hand, suggests bilateral heart failure or a noncardiac etiology of the effusion. Congestive heart failure is also known to be associated with a pseudotumor or "vanishing" tumor, representing an interlobar collection of pleural fluid (Fig. 12-17). As congestive heart failure improves, the "tumor" disappears.

Vanishing Pseudotumor
Figure 12-17: Patient with congestive heart failure. Note gross cardiomegaly, cephalization, interstitial pulmonary edema, and right-sided pleural effusion. Some of the fluid was loculated in the minor interlobar fissure (arrow), which disappeared with improved cardiac function.

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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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