electron microscopy disclosed that the tumor cells contained prominent microvilli , basal laminae adjacent to the stroma , junctional complexes , desmosomes , tonofilaments , clusters of glycogen granules , well developed rough endoplasmic reticulum ( rer ) , confronting cisternae showing direct continuity with the rer and membrane-bound granules suggestive of secretory activity .
C0230779
rough endoplasmic reticulum
C1180016
cisternae