could it be cancer related?

greenish nipple discharge from a 21 year old male? what is this? could it be cancer?

[Ketan K Badani]

This is unusual, and should be evaluated properly by a doctor.  Possibilities beyond cancer include infection, hormone imbalance, trauma.  Although your symptom does not necessarily mean cancer, men can get breast tumors and you should rule it out by a doctor visit along with the other possiblities.