INTRANUCLEAR CISTERNAE RESEMBLING STRUCTURES OF THE GOLGI COMPLEX

Abstract

The presence of cytoplasmic structures, apparently inside the nuclei of neoplastic cells, has been observed repeatedly in the electron microscope (1). These structures, designated pseudoinclusions (1), are the result of cross-sections of cytoplasmic invaginations of the nuclear membrane. Their extranuclear origin is evident, since these structures are surrounded by a well defined, double, nuclear membrane. A situation different from these pseudo-inclusions is reported here.