Observations on benign mesothelioma of the genital tract (adenomatoid tumor).A comparative ultrastructural study

The purpose of this study was to compare the fine structure of the genital adenomatoid tumor with extragenital mesotheliomas. The pertinent electron microscopic and histochemical literature on normal and neoplastic mesothelia, müllerian and mesonephric epithelia, has been reviewed to provide additional comparative data. The results of this combined investigation strongly suggest a mesothelial origin of the “adenomatoid tumor,” and the term “benign mesothelioma of the genital tract,” proposed by Masson et al., would appear to be the preferable designation.