%0 Journal Article %T Chasing Ghosts: Unexplained Artifactual Echogenicity on the Aortic Valve Leading to Unwarranted Surgery %J Archive of "CASE : Cardiovascular Imaging Case Reports". %D 2019 %R 10.1016/j.case.2019.01.002 %K Artifact %K Aortic valve %K Papillary fibroadenoma %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6588731/