Tidlig brystkræft i HERA- undersøgelsen var begrænset til operabel, primær, invasiv adenokarcinom i brystet med aksil positive lymfeknuder, eller aksil negative lymfeknuder hvis tumorer var mindst 1 cm i diameter.
Early breast cancer in the HERA trial was limited to operable, primary, invasive adenocarcinoma of the breast, with axillary nodes positive or axillary nodes negative if tumours at least 1 cm in diameter.