50 year old woman with a large fungating and ulcerated, foul-smelling mass in the breast.
The breast shows a large, firm, tan-coloured, fleshy mass with foci of necrosis. The mass has ulcerated through the skin and is covered by a layer of necrotic slough. The tumour has irregular invasive borders and closely abuts the underlying skeletal muscle. The residual breast shows whitish areas of fibrosis.