Conditions: Multiple Myeloma and Plasma Cell Neoplasm
Keywords: stage I multiple myeloma stage II multiple myeloma stage III multiple myeloma refractory multiple myeloma
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 21
Healthy volunteers: no

Brief summary:
RATIONALE: Monoclonal antibodies, such as rituximab, can block cancer growth in different ways. Some block the ability of cancer cells to grow and spread. Others find cancer cells and help kill them or carry cancer-killing substances to them. Drugs used in chemotherapy, such as cyclophosphamide, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Giving rituximab together with cyclophosphamide may kill more cancer cells.

PURPOSE: This phase II trial is studying how well giving rituximab together with cyclophosphamide works in treating patients with high risk, refractory, or relapsed multiple myeloma.

Detailed description:
OBJECTIVES:

* Determine the effect of rituximab and high-dose cyclophosphamide on the growth of myeloma stem cells in patients with high-risk, refractory, or relapsed multiple myeloma.

OUTLINE: Patients receive rituximab IV on days -10 and -7; once weekly for 4 weeks (after completion of high-dose cyclophosphamide); and then once in months 3, 6, 9, and 12. Patients also receive high-dose cyclophosphamide on days -3 to 0.

PROJECTED ACCRUAL: Not specified.

Arms:
arm 1: Rituximab 375 mg/m\^2 on Days -10 and -7; Cyclophosphamide 50 mg/kg on days -3, -2, -1, and 0; Rituximab 375 mg/m\^2 weekly x4 after platelet counts recover; For patients achieving at least stable disease, rituximab maintenance 375 mg/m\^2 once each during months 3, 6, 9, and 12

Interventions: intervention 1: rituximab intervention 2: cyclophosphamide
Intervention descriptions: intervention 1: None intervention 2: None

Protocol document: