Image of the Week (18)
Excision biopsy - mammary hamartoma with abundant smooth muscle bundles (myoid hamartoma)
Mammary hamartoma - note vague circumscription on macro view, stellate architecture on this low power view and peripheral cysts and epithelial proliferation.
'Mouse Over' shows closer view of centre of lesion with smooth muscle bundles and benign epithelial islands
Detail from image above: note peripheral cysts with apocrine metaplasia and foci of usual type epithelial hyperplasia. 'Mouse over' shows detail of smooth muscle bundles