For Allergan Biocell breast implants an increased risk of BIA-ALCL (a very rare type of lymphoma) is plausible. The cases of BIA-ALCL in the Netherlands are predominantly found with Biocell and other breast implants with a rough surface. However, RIVM found insufficient evidence that other breast implants with a rough surface present a similar risk as Biocell implants. This is due to the small number of BIA-ALCL cases and the limited use of these other implants.