Second Autologous Stem Cell Transplant (ASCT) as Salvage Therapy in Patients with Relapsed Multiple Myeloma: Improved Outcomes in Patients with Longer Disease Free Interval after First ASCT.
Notice bibliographique
Résumé
Abstract Background: Single autologous stem cell transplant (ASCT) is considered the standard of care for younger multiple myeloma (MM) patients (pts). However, it is not curative and virtually all patients will ultimately relapse. As more options, such as biological therapy, are available to treat relapsed disease, the role of a second ASCT as salvage therapy is unclear. Method: Retrospective review of all MM pts who received a 2nd ASCT as salvage therapy at Princess Margaret Hospital. Results: Between February 1997 and June 2007, 61 MM pts received a second ASCT for relapsed MM at our institution. Median age was 56 yrs (range 35–71) at second transplant. 37 pts (61%) were male. Immunoglobulin subtype included IgG (36), IgA (14), light chain (6), nonsecretory (3), IgM(1) and IgD (1). Transplant conditioning regimen for first transplant was high dose melphalan (MEL) 140–200 mg/m2 in 51, MEL/etoposide(E)/TBI in 4, and MELl/TBI in 2. 2nd ASCT conditioning consisted of MEL + TBI +/− E in 2, MEL alone in 58 and Busulfan/Cyclophosphomide in 1. The median time from diagnosis to first transplant was 9.7 months (2.0–74.2). The median time to relapse after the first transplant was 32.6 months (9.7–85.6), with a median interval between transplants of 45.1 months (19.7– 115). Two transplant-related deaths occurred (3%). Response to first transplant was 4 CR (8%), 34 PR (68%), 2 MR (4%) and 10 SD (20%). Nineteen pts went on to maintenance therapy between transplants. Response to second transplant was 4 CR (8%), 41 PR (80%), 5 SD (10%) and 1 PD (2%). Median progression-free survival (PFS) was 15.8 months (0–63.8) while median overall survival (OS) was 4.2 years (0–7.0) after 2nd ASCT. The relationship between progression-free interval after 1st ASCT and the outcome of the 2nd ASCT is summarized Table 1. Patients can be stratified into two groups, those with a disease free interval of less than or greater than 24 months. The use of maintenance therapy did not differ between the two groups, 6 (40%) in patients with PFS ≤24 months and 13 (28%) in patients with PFS >24 months. Conclusions: 2nd ASCT is a feasible and safe salvage therapy in patients with relapsed MM. 2nd ASCT is effective in providing a median progression free survival of 1.25 years and median overall survival of 4.2 years after 2nd ASCT - results that compare favourably with other salvage approaches. Patients with a longer disease free interval after 1st ASCT experience a better progression free survival and overall survival after 2nd ASCT. It is reasonable, therefore, to consider a 2nd ASCT if the time to progression is greater than 2 years after first ASCT. Outcomes Based on Time to Progression Post 1st ASCT PFS post 1st ASCT # of pts median PFS post 2nd ASCT PFS post 2nd ASCT1 Median OS post 2nd ASCT OS post 2nd ASCT2 1 p< 0.005, 2 p< 0.05 ≤24 months 15 12.7 months 1 year: 46% 3.5 years 1 year: 85% 2 year: 11% 2 years: 76% 3 years 0% 3 years: 63% 4 years: 31% > 24 months 46 19.8 months 1 year: 74% 5.9 years 1 year: 91% 2 year: 45% 2 years: 82% 3 year: 31% 3 years: 65% 4 years: 55%
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».