the agency has received 660 total medical
device reports (MDR) regarding BIA-ALCL
cases in the United States – an increase of
246 new MDRs (59 percent) from the
previous year’s update. Acknowledging
that the nature of the MAUDE database’s
reporting system is susceptible to duplicate
reports, the agency’s analysis suggests
there are only 457 unique cases,
including nine deaths, of BIA-ALCL
reported (since 2010). The FDA
also notes that while the MDR
system is a valuable source of information,
it is a passive surveillance system with
limitations, including incomplete,
inaccurate, untimely, unverified or
biased data in the reports. The
incidence or prevalence of BIA-ALCL
cannot be determined from this reporting
system alone, due to potential under-
reporting, duplicate reporting and lack
of information about the total number