just want to add that it's really important to know if someone has EVER had radiation or lymph node removal. people who have had these procedures may not be aware of the risk for lymphedema due to massage, especially if treatment has been complete for some time (or even if they're in treatment).
in my chair massage class we did not talk about this risk, but have since taken the massage for people living with cancer class...and this is a huge issue.
people with lymph node removal can still receive massage, but there are specific precautions and changes to make...