Breast Cancer after Hodgkin's Disease

I would be very interested to hear from anyone who has been diagnosed with breast cancer having been exposed to mantle field radiation treatment for Hodgkin's Disease.

Back in 1992 at the age of 24 I received Mantle Field Radiation for Hodgkin's disease.  Two weeks ago I found a lump and swelling in my right breast and after routine tests have been diagnosed with breast cancer.  I am due to have an MRI in the next few days.  The lump is a grade 3.  I have been advised to undergo a double mastectomy.