Structure of an isolated cerebellum and related nuclei developed within the matrix of a mature ovarian teratoma

The distribution and organization of nerve cells in a microcerebellum and cerebellar stalk, developed within the matrix of a mature ovarian teratoma, were analyzed with respect to recent data on cerebellar histogenesis. It is postulated that a neuroectodermal germinal locus with proliferation capability similar to that found in the alar plates of the normal embryonic rhombencephalon was responsible for the formation of this highly organized neural tissue.