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.
RETROACTIVELY, RETROACTIVITY. Generally refer to laws or court decisions which affect already existing rights, obligations and duties, or attach new conditions in respect to transactions or events already past. Retroactivity depends on whether the new provision attaches new legal consequences to events completed before its enactment.