Table 1.

Definition of a regional, other-regional, local and distant recurrence

Classification	Events included
Regional recurrence	Recurrence in an ipsilateral axillary-, infraclavicular-, or supraclavicular lymph node
Other-regional recurrence	Recurrence in an ipsilateral internal mammary lymph node
Local recurrence	Recurrence in skin or subcutaneous tissue on the ipsilateral chest wall
Distant recurrence	Recurrence in any other location, including recurrence involving the
	sternal bone, or contralateral lymph nodes