P51. DOES INITIAL FILL-TYPE MATTER? COMPARING COMPLICATION RATES AND PATIENT-REPORTED OUTCOMES IN PREPECTORAL TISSUE EXPANDERS INITIALLY FILLED WITH AIR VERSUS SALINE. (1st April 2022) - Coriddi, Michelle; Plotsker, Ethan L.; Haglich, Kathryn; Rubenstein, Robyn N.; Chu, Jacqueline J.; Allen, Robert J.; Dayan, Joseph H.; Mehrara, Babak J.; Disa, Joseph J.; Nelson, Jonas A.