Patient advocate raises alarm on breast density after delayed cancer diagnosis

Calls are being made for better screening for women with dense breasts.

When she was diagnosed with breast cancer, Siobhán Freeney was shocked to discover how large her tumour was — after a previous mammogram had not picked it up.

In December 2015, Ms Freeney was diagnosed with stage three invasive lobular carcinoma, a type of breast cancer that starts as a growth of cells in the breast’s milk-producing glands.