Conditions: Prostate Cancer
Keywords: stage IIB prostate cancer stage IIA prostate cancer stage III prostate cancer stage IV prostate cancer
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 67
Healthy volunteers: no

Brief summary:
RATIONALE: Giving samarium Sm 153 lexidronam pentasodium and 3-dimensional (3-D) conformal radiation therapy or intensity-modulated radiation therapy may keep prostate cancer from growing in patients with rising prostate-specific antigen (PSA) levels after radical prostatectomy for prostate cancer.

PURPOSE: This phase II trial is studying how well samarium Sm 153 lexidronam pentasodium and 3-D conformal radiation therapy or intensity-modulated radiation therapy work in treating patients with rising PSA levels after radical prostatectomy for prostate cancer.

Detailed description:
OBJECTIVES:

Primary

* To assess the effectiveness of samarium Sm 153 lexidronam pentasodium (as determined by a 30% decline in the PSA level within 12 weeks) followed by either three-dimensional conformal radiation therapy or intensity-modulated radiation therapy in patients with rising prostate-specific antigen levels (PSA) after radical prostatectomy prostate cancer.

Secondary

* To assess the proportion of patients completing protocol treatment.
* To evaluate hematological toxicity at 12 weeks.
* To evaluate samarium Sm 153 lexidronam pentasodium-related adverse events at 12 weeks.
* To evaluate the "acute" and "late" radiation therapy-related events having occurred up to 24 weeks from the end of radiation therapy.
* To compare the freedom from progression rate at 2 years to that predicted by the Kattan Nomograms.

OUTLINE: Patients receive samarium Sm 153 lexidronam pentasodium (SM) IV on day 1. Patients are closely monitored for prostate-specific antigen (PSA) level and SM-associated toxicity for 12 weeks. After the 12 weeks, patients undergo either intensity-modulated radiation therapy or 3-dimensional conformal radiation therapy 5 days a week for 7-8 weeks. Patients may receive hormonal therapy (after radiation therapy) at the discretion of their physician.

Treatment continues in the absence of disease progression (defined as a PSA doubling time less than 3 months), severe thrombocytopenia (defined as a platelet count of 25,000 cells/mm³ or less), or unacceptable toxicity.

After completion of study treatment, patients are followed up at 3 months, 6 months, and 12 months, every 6 months for 2 years, and then annually thereafter.

Arms:
arm 1: Samarium 153 infusion followed by radiotherapy 12 weeks later

Interventions: intervention 1: Radiotherapy intervention 2: Samarium 153
Intervention descriptions: intervention 1: 3D-CRT or IMRT 64.8-70.2 Gy to the prostatic fossa begins 12 weeks (+/- 1 week) after Samarium 153 administration. Daily tumor doses of 1.8 - 2.0 Gy per day, 5 days per week x 7-8 weeks. intervention 2: Samarium 153 lexidronam dose 2.0 mCi/kg by IV injection one time within 2 weeks (+/- 3days) after registration.

Protocol document: