Sentence:  The <WSD>enhancement</WSD> characteristics of a PNET on CT may also have prognostic value, as lesions that hypoenhance on CT scan tend to have worse overall survival than lesions that are isoenhancing or hyperenhancing (5-year survival 54% vs 89% vs 93%). 
Meaning of the word marked with <WSD> tags:  The degree to which the image of a scan stands out as a bright area.