Cytological features of breast implant-associated anaplastic large cell lymphoma in pleural effusion
Breast implant-associated anaplastic large cell lymphoma (BIA-ALCL) is a very rare CD30-positive ALK-negative T-cell non-Hodgkin lymphoma included as a provisional entity in the 2017 WHO classification of lymphoid neoplasms. BIA-ALCL arises as proliferating cells over the surface of the implant. It is generally an indolent disease if confined within the fibrous capsule. In contrast, mass and/or infiltration beyond the capsule is much more aggressive.