Of the common causes for exudative pleural effusions, parapneumonic effusions have the highest diagnostic priority. Even in the face of antibiotic therapy, infected pleural effusions can rapidly coagulate and organize to form fibrous peels that might require surgical decortication.
Retrogradation is the landward change in position of the front of a river delta with time.etrogradation is the landward change in position of the front of a river delta with time.
There are two main types of amnesia: retrograde and anterograde. Retrograde means you lose your memories from before the surgery, injury, or whatever incident caused the memory loss. One famous retrograde case is Doug Bruce, the subject of the film Unknown White Male who said he awakened one day on the subway in New York and didn't know who he was.