“…Our data indicate that primary MV tumors accounted for 0.011% (11/95,980) of all open-heart operations and 1.62% (11/678) of primary heart tumors. To date, the majority of information regarding primary MV tumors has accumulated from either scattered case reports [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19] or general series of heart tumors [20,21,22,23,24], while there are no larger surgical cohorts on this rare entity. In this paper, we present our experience with primary MV tumors in a series of 11 patients, based on our previous cohort [25], in terms of clinical and pathological features and report the long-term results of surgical treatment over a 25-year period.…”