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.
In human anatomy, the pelvis (plural pelvises) is either the lower part of the trunk, between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it (sometimes also called bony pelvis, or pelvic skeleton). the bony pelvis (or pelvic skeleton), which is the part of the skeleton embedded in the pelvic region of the trunk, subdivided into: 2  the pelvic girdle (i.e., the two hip bones, which are part of the appendicular skeleton), which connects the spine to the lower limbs, and.