The combined treatment of Tadalafil and MUC1/polyICLC vaccine was well tolerated with no serious adverse events or treatment limiting toxicities. All patients were previously irradiated as per study protocol, with 5 of 7 on the active treatment arm and 5 of 6 on the control arm receiving chemotherapy with radiation therapy as part of their prior treatment. Long term (two years) clinical outcomes and toxicity data of 7 evaluable treatment patients and 6 control patients will be reported in addition to long term analyses of the immunomodulatory effects of the treatment intervention.