Patients with "biopsy proven" soft tissue tumor or MRI/PET imaging convincing of recurrences of prostate fossa

Surgery is not a desirable alternative therapy at the time of enrollment

Radiation therapy has failed or not indicated or can be safely postponed

Tumor size is \< 5 cm at its largest diameter

Tumor does not encompass the rectal wall or external urethral sphincter

Patient is able to undergo MRI

MR-Guided Cryoablation of Prostate Bed Recurrences