Clinical trial · Interventional
TOtal Skin Electron Beam Therapy (Low-dose) for Tumor Clone Eradication in Early-stage Mycosis Fungoides
TOtal Skin Electron Beam Therapy (Low-dose) for Tumor Clone Eradication in Early-stage Mycosis Fungoides: a Prospective Randomized Controlled Study
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Primary cutaneous T-cell lymphomas are a group of peripheral T-cell lymphomas that primarily involve the skin. Mycosis fungoides (MF) is the most frequent subtype. Most patients with early-stage MF (i.e., patches and plaques of the skin without extracutaneous involvement) have a good prognosis but a subset of patients progress to incurable advanced-stage disease with an overall survival (OS) less than 5 years and an impaired quality of life. We have recently identified the tumor clone frequency in lesional skin (measured by high-throughput sequencing of the TCRB locus) as the most important prognostic factor of progression-free survival (PFS) and OS in a retrospective analysis on 210 patients with early-stage MF (p\<0.001). Phototherapy is a standard therapeutic option in early-stage MF but fails to eradicate the tumor clone from the skin. Low-dose total-skin electron-beam therapy (LDTSEBT, 12 Gy over a 3-week period) has been shown to be safe and highly effective in MF with an 88% overall response rate and a better safety profile compared to standard-dose total-skin electron-beam therapy, in a pooled analysis from 3 phase II trials on 33 patients and a retrospective analysis of 12 patients treated with LDTSEBT. We hypothesize that the use of LDTSEBT is associated with a significantly higher 1-year PFS compared to conventional treatment with phototherapy. Our secondary hypotheses are that LDTSEBT is associated with a higher tumor T-cell clone eradication compared to phototherapy, and improves OS and quality of life in patients with skin-limited MF. The main objective of this study is therefore to prospectively determine if LDTSEBT is associated with a higher 1-year progression-free survival in patients with early-stage mycosis fungoides, compared to conventional treatment with phototherapy. The primary endpoint is PFS at 12 months after study inclusion.
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Cutaneous T Cell Lymphoma | Primary Cutaneous T-Cell Non-Hodgkin Lymphoma | ALIAS | 0.90 |
| Mycosis Fungoides | Mycosis Fungoides | ONTOLOGY_EXACT | 0.98 |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Low-dose total-skin electron-beam therapy | Other | — | UNRESOLVED |
| Phototherapy | Other | — | UNRESOLVED |
Design
Arms and outcomes
Arms (2)
- type
- OTHER
- label
- Low-dose total-skin electron-beam therapy
- description
- Low-dose total skin electron beam therapy (12 Gy) will be delivered to the patient in 4 Gy/week, 1 Gy/day over 3 weeks by symmetrical electron beams of 6 MeV energy via a linac accelerator.
- interventionNames
- Other: Low-dose total-skin electron-beam therapy
- type
- OTHER
- label
- Phototherapy
- description
- Phototherapy will be given 3 times a week during 2 months, then twice a week during one month, then once a week during one month, or until disease progression or unacceptable side effect, whatever comes first. Patients with plaques will receive PUVA therapy and patients with patches only will receive narrow-band UVB therapy.
- interventionNames
- Other: Phototherapy
Primary outcomes (1)
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Age ≥ 18 years * Histopathologically confirmed diagnosis of International Society for Cutaneous Lymphomas (ISCL) / European Organisation for Research and Treatment of Cancer (EORTC) mycosis fungoides stage IB or IIA Exclusion Criteria: * Poor performance status: WHO performance status score \> 2 * Physically unable to maintain the posture * Patient with no health coverage * Patient under guardianship or curatorship * Previous history of dose-limiting radiation therapy in the field * Previous history of dose-limiting phototherapy * Previous history of melanoma, skin squamous cell carcinoma or basal cell carcinoma or other absolute contraindication to phototherapy (including a history of lupus, xeroderma pigmentosum, or porphyria) * Pregnant or breastfeeding woman * Contraindication to methoxsalen (severe liver, renal or heart failure)
References
Publications (0)
Data not yet available