Magnetic resonance imaging of XXXX : update.

@entity5 @entity1 @entity263 @entity1486
@entity263 is the most common @entity5 in the world, the most frequently diagnosed in the United States, and the second most lethal @entity5 in U.S. @entity1 . Earlier diagnosis implies better prognosis. However, prognosis may be dependent upon the stage of the @entity5 at the time of diagnosis and implementation of appropriate therapy. Clinical staging, even with the development of serum @entity1486 and other studies, has not proven to be highly accurate, particularly to identify and quantitate local disease and extension. Imaging has, in the past, also had limited success. With the development of computed tomography (CT), endorectal ultrasound, and magnetic resonance imaging (MRI), there was great expectations for improvement. However, CT and ultrasound have not been as accurate as hoped. MRI, because of its multiorientation and multiparameter abilities, has been the most definitive imaging tool for staging of local extension, yet still has limitations. The prostate capsule, the neurovascular bundles, the seminal vesicle, and other regions prone to initial attack by @entity5 extension can be seen exquisitely clearly by the newer approaches to MRI. @entity5 extension, however, cannot be consistently identified when it is microscopic. MRI is an accurate identifier of macroscopic, even subtle macroscopic disease, but there are still limitations in its ability to diagnose all pathology.
