[Ultrastructure of osteoid islets in mixed-type hepatoblastoma].


Composite morphological studies established that "osteoid" may consist of various portions of finely granular nonparticular basic substance and fibrous structures resembling collagen fibers and randomly interwoven in different directions. This substance was found to be synthesized by myoepithelial-like cells contacting by desmosomes and desmosome-like… (More)