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Efficacy and Safety of Siltuximab Combined with BCD Regimen (Bortezomib, Cyclophosphamide, Dexamethasone) in Patients with Severe Idiopathic Multicentric Castleman Disease: A Prospective, Single-Center, Single-Arm Study

Efficacy and Safety of Siltuximab Combined with BCD Regimen (Bortezomib, Cyclophosphamide, Dexamethasone) in Patients with Severe Idiopathic Multicentric Castleman Disease: A Prospective, Single-Center, Single-Arm Study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2600126769
Enrollment
Unknown
Registered
2026-06-15
Start date
2026-06-15
Completion date
Unknown
Last updated
2026-06-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Castleman disease (CD)

Interventions

Siltuximab combined with BCD treatment group:None

Sponsors

Peking Union Medical College Hospital
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Over 18 years old; 2. Meet the diagnostic criteria for severe iMCD in iMCD: (1) iMCD diagnostic criteria: Patients need to meet the following 2 major criteria and 2 minor criteria to be diagnosed with iMCD (at least 1 must be a lab test), and other diseases that might cause "Castleman-like changes" in lymph nodes must be excluded. Major criteria include: 1) Pathology consistent with Castleman disease; 2) Enlargement of lymph nodes in at least two locations with a short axis over 1 cm. Minor criteria include (the first 6 are lab tests, the last 5 are clinical manifestations): 1) Elevated CRP; 2) Anemia; 3) Increased or decreased platelets; 4) Low albumin; 5) Kidney dysfunction or protein in urine; 6) Polyclonal hypergammaglobulinemia; 7) Systemic symptoms; 8) Enlarged liver or spleen; 9) Serous effusion or edema; 10) Characteristic rash; 11) Interstitial pneumonia. (2) Severe iMCD Classification Criteria: Patients need to meet 2 or more of the following 5 criteria to be diagnosed with severe iMCD: 1) ECOG performance status >= 2; 2) eGFR < 30 ml/min/1.73 m^2; 3) Severe edema and/or ascites, pleural effusion, or pericardial effusion; 4) Hb <= 80 g/L; 5) Lung involvement or interstitial pneumonia with shortness of breath. 3. Women of childbearing age need to agree to pregnancy screening before the study starts, and all patients must use contraception during the study and for 3 months after the last dose. 4. All patients must sign an informed consent form.

Exclusion criteria

Exclusion criteria: 1. Used immunosuppressants or anti-cancer drugs in the past 3 months (excluding patients who used corticosteroids within 1 week before enrollment). 2. Having other malignant tumors. 3. Peripheral neuropathy of grade 2 or higher. 4. Active infection. 5. Women who plan to get pregnant within a year, are pregnant, or breastfeeding. 6. Refuse to sign informed consent or cannot follow up at our hospital. 7. Have underlying diseases such as systemic lupus erythematosus, POEMS, lymphoma, or HHV-8 infection that may cause lymph node changes similar to Castleman’s disease. 8. Severe allergy to any component of the treatment regimen (siltuximab, bortezomib, cyclophosphamide, dexamethasone).

Design outcomes

Primary

MeasureTime frame
Overall response rate;

Secondary

MeasureTime frame
Laboratory indicators;Progression-free survival of siltuximab combined with BCD therapy;Safety analysis;Overall survival of the enrolled patients;

Countries

China

Contacts

Public ContactLu Zhang

Peking Union Medical College Hospital

pumczhanglu@163.com+86 10 6915 5001

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Jun 29, 2026