In accordance with previous observations in a large cohort of mesotheliomas [53] (frequent loss of BAP1 expression, particularly in the epithelioid subtype), our immunohistochemical evaluation for BAP1 showed negativity in all seven (100%) cases of epithelioid and in two cases (33.3%) of biphasic mesotheliomas (Table 4). Here, BAP1 is linked to mesothelioma.