BioInnovation LLC View Institution's Website 1 article published in JoVE Biology Preparation and Using Phantom Lesions to Practice Fine Needle Aspiration Biopsies Vinod B. Shidham1, George M. Varsegi1, Krista D'Amore1, Anjani Shidham2 1Department of Pathology, University of Wisconsin - Milwaukee, 2BioInnovation LLC Practicing of fine needle aspiration biopsies (FNAB) by trainees is relatively challenging, due to the lack of an easily available, appropriate lesion. Preparation of an AV phantom lesion for practicing the FNAB procedure and mastering proficiency is relatively easy.