ESTRO Multidisciplinary Management of Breast Cancer 2017

partial seroma cavity present

Micr. extension

Region with microscopic extension, within 1.5 cm of primary tumor

1.5 cm minus free margin

Internal surgical scar

Partial seroma cavity

Tumorbed after closure of lump cavity

Region expected to encompass the tumorbed

CTV

Boersma et al, 2012