Image of the Week (17)
Grade 1 carcinoma - diagnosis confirmed using CK5/6 immunohistochemistry
Note the benign ducts with two cell layers top right and bottom left just outside the circle and suspicious cells within the circle.
'Mouse-over' - CK5/6 staining positive in benign duct highlighting the myoepithelial cells and negative in the tumour area
Detail from image above - 'Mouse over' for CK5/6 stain.