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.
1 Endometriosis â the endometrium is the lining of the uterus. Endometriosis is the growth of endometrial cells outside the uterus. These cells can cause retroversion by âgluingâ the uterus to other pelvic structures.  Fibroids â these small, non-cancerous lumps can make the uterus susceptible to tipping backwards.