Pleurisy Causes & Risk Factors. Causes and Risk Factors for Pleurisy. Pleurisy can develop as a complication of several conditions. In some cases, the condition is idiopathic (i.e., occurs with no known cause). The most common cause for pleurisy is viral infection (e.g., influenza, pneumonia).
An extrarenal pelvis is a normal variation from the usual anatomy, and it does not indicate a state of disease. However, renal pelvises do not usually protrude in such a manner, and it may appear as if there is a blockage in the renal pelvis that is preventing urine from emptying, which is a serious medical condition.
Solution: Male pelvis is heavier with a deeper false pelvis, a smaller pelvic inlet, a. rounder obturator foramen, and a pubic arch less than 90 degrees. The female pelvis is lighter with a shallower false pelvis, oval shaped pelvic inlet, and a pubic arch of over 90 degrees.