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Efficacy and Safety of Low-Dose Cytarabine Combined with Thalidomide in the Treatment of Adult Patients with Untreated Langerhans Cell Histiocytosis: A Prospective, Multicenter, Single-Arm Study

Efficacy and Safety of Low-Dose Cytarabine Combined with Thalidomide in the Treatment of Adult Patients with Untreated Langerhans Cell Histiocytosis: A Prospective, Multicenter, Single-Arm Study

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2600123531
Enrollment
Unknown
Registered
2026-04-27
Start date
2025-09-24
Completion date
Unknown
Last updated
2026-05-04

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

Conditions

Langerhans cell histiocytosis

Interventions

Experimental group:Low-dose cytarabine combined with thalidomide

Sponsors

Langfang Campus of Chinese Academy of Medical Sciences Cancer Hospital
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 70 Years

Inclusion criteria

Inclusion criteria: 1. Histopathology confirms a diagnosis of LCH; 2. Age between 18 and 70 years; 3. Multi-system involvement, or multiple lesions in a single system; 4. No previous systemic treatment (patients who only received local radiotherapy may be included); 5. ECOG performance status score <=2; 6. Clinician judges the patient suitable for treatment with this regimen; 7. The subject is able to understand the study protocol and is willing to participate, providing written informed consent;

Exclusion criteria

Exclusion criteria: 1. Patients with LCH involving the central nervous system; 2. Single-system, single-lesion LCH; 3. Major surgery within 4 weeks prior to the first dose in the study; 4. Radiotherapy within 4 weeks prior to the first dose in the study; 5. History of myocardial infarction within the past year; patients with New York Heart Association (NYHA) Class 3 or 4 congestive heart failure, or a prior history of NYHA Class 3 or 4 congestive heart failure, unless the left ventricular ejection fraction (LVEF) is >=50% in an echocardiogram (ECHO) screening conducted within 1 month prior to entering the study; 6. Pregnant or breastfeeding women (women of childbearing potential testing positive for pregnancy at baseline or not having undergone a pregnancy test; postmenopausal women must have been menopausal for at least 12 months); 7. Abnormal liver or kidney function: creatinine levels >=176.8 µmol/L (2 mg/dl), transaminases or bilirubin levels greater than 2 times the upper limit of normal; 8. Severe hematologic abnormalities: absolute neutrophil count less than 1×10^9/L, platelets (PLT) less than 50×10^9/L; 9. Presence of uncontrolled infection; 10. Any other condition deemed by the investigator as rendering the patient unsuitable for participation in the study.

Design outcomes

Primary

MeasureTime frame
Event-Free Survival;

Secondary

MeasureTime frame
Overall response rate (ORR);Cytokine;FACT-G (Functional Assessment of Cancer Therapy-General);The sum of the proportions of subjects with the best overall response of complete remission (CR) or partial remission (PR).;circulating free DNA (cfDNA);Overall survival (OS);

Countries

China

Contacts

Public ContactXinxin Cao

Cancer Hospital Chinese Academy of Medical Sciences

caoxinxin@126.com+86 10 69155027

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: May 7, 2026