Table 3.
Society (Ref.) | Age | Tumour size | Histology | DCIS | Margin status | Induction therapy | Nodal status | Tumour grade | EIC |
---|---|---|---|---|---|---|---|---|---|
ASTRO44,45 | ≥60 years | ≤2 cm | Unifocal, unicentric invasive ductal carcinoma or other favourable types | Not allowed | Tumour-free within 2 mm | Not allowed | N0 | Any | Not allowed |
GEC-ESTRO46 | ≥50 years | <3 cm | Unifocal, unicentric invasive ductal carcinoma or other favourable types | Not allowed | Tumour-free within 2 mm | Not allowed | N0 | Any | Not allowed |
ABS47 | >50 years | ≤3 cm | Invasive ductal carcinoma | Not allowed | Negative | Not specified | N0 | Not specified | Not specified |
ASBS47 | >45 years | ≤3 cm | Invasive ductal carcinoma and/or DCIS | Allowed | Negative | Not specified | SN negative | Not specified | Not specified |
Abbreviations: ABS, American Brachytherapy Society; ASBS, American Society of Breast Surgeons; ASTRO, The American Society for Radiation Oncology; DCIS, ductal carcinoma in situ; EIC, extensive intraductal component; GEC-ESTRO, Groupe Europeen de Curietherapie-European Society for Therapeutic Radiology and Oncology; SN, sentinel node.