during the second and third days after irradiation the lesions are invaded by two kinds of cells which both appear to arise through the off-budding of the nucleus-containing apical protrusions of the pigment epithelial cells around the lesions : ( a ) phagocytic cells which disintegrate the damaged tissue and , as this process is completed 4 -- 9 days after irradiation show evidence of melanogenesis ;
C0007634
cells
C0007610
nucleus