Fig. 3
From: Ultrastructural analysis of breast cancer patient-derived organoids
a Representative image of a single cell with numerous keratin (CC) filaments. This cell was in basal position and in closed contact with tumour cells (CT). b Magnification of panel a that depicted one cell in basal position, full of keratin (CC) filaments. Also, the neighbouring tumour cells (CT) were displayed. c Magnification of keratin (CC) filaments. d Representative image of keratinized cells. The cytoplasm is full of keratin filaments (CC), “ghost” desmosomes and cellular organelles were absent. Intercellular lumen = *, D = desmosome