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.
Retrograde ejaculation is a condition in men where semen enters the bladder instead of leaving the body through the penis. Normally, when a man ejaculates, semen is propelled down through the urethra and out of the body.