[Fine structure of the myoblastic myoma].

A series of 10 myoblastic myomas were examined with the light and electron microscope. Based on electron microscopical examinations, the findings permitted to divide the cases according to their most probable histogenesis in two groups as follows: a) the granular lesions of the appendix and those of the hypophyseal infundibulum most probably originate from nervous tissue; b) the lesions of the skin and the tongue most probably are results of alterations of cell metabolism.