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.
Retcon = Retroactive Continuity -- refers to a story or idea written to change or add to the already established history of a canon or fanfic. Often, it is performed to smooth out continuity so that there are no gaps or glaring errors in the characterizations or plot-lines as new ideas are introduced.