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.
2. a retrograde change of the body or of an organ, as the retrograde changes in size of the female genital organs after delivery. 3. the progressive degeneration occurring naturally with age, resulting in shriveling of organs or tissues.involuÂ´tional.