Table 1  Recommendation levels of the AGO Breast Committee.

++	This investigation or therapeutic intervention is highly beneficial for patients, can be recommended without restriction, and should be performed.
+	This investigation or therapeutic intervention is of limited benefit to patients and can be performed.
+/−	This investigation or therapeutic intervention has not shown benefit for patients and may be performed only in individual cases. According to current knowledge, a general recommendation cannot be given.
−	This investigation or therapeutic intervention can be of disadvantage to patients and might not be performed.
− −	This investigation or therapeutic intervention is of clear disadvantage for patients and should be avoided or omitted in any case.