Abstract
BACKGROUND: Isolated limb infusion and perfusion (ILI/ILP) has been a mainstay treatment for unresectable melanoma in-transit metastases (ITM), but increased use of immune checkpoint inhibitors (ICI) and intralesional therapy (talimogene laherparepvec [TVEC]) introduced several different management options. This study compares first-line ILI/ILP, ICI, and TVEC.
METHODS: Retrospective review from 12 international institutions included patients treated from 1990 to 2022 with first-line ILI/ILP, ICI, or TVEC for unresectable melanoma ITM.
RESULTS: A total of 551 patients were treated, with ILI/ILP (n = 356), ICI (n = 125), and TVEC (n = 70) with median follow-up of 5.5 years. Tumor burden was highest with ILI/ILP and lowest with TVEC (p = .002). Breslow thickness was lowest with TVEC (p = .007). TVEC was mostly used in stage IIIB disease versus IIIC for ILI/ILP and ICI (p = .01). Using ICI as the reference category, TVEC had the highest odds of a complete response (CR) (odds ratio, 1.96; p = .029) and a longer local progression-free survival (PFS) (hazard ratio [HR], 0.40; p = .003). ILI/ILP had shorter local PFS (HR, 1.72; p = .012), PFS (HR, 1.79; p < .001), distant metastasis-free survival (DMFS) (HR, 1.75; p = .014), overall survival (HR, 1.82; p = .009), and melanoma-specific survival (HR, 2.29; p = .004). Stage IIIB disease had longer DMFS (HR, 0.24; p < .001) compared to IIIC/D.
CONCLUSIONS: TVEC as first-line therapy for unresectable melanoma ITM was associated with superior CR rates and local PFS. Notably, TVEC was used in patients with a lower Breslow thickness, disease stage, and tumor burden. Therefore, when compared to ILI/ILP and ICI, TVEC should be considered as first-line therapy for unresectable stage IIIB melanoma ITM with minimal tumor burden and lower Breslow thickness.
| Original language | English |
|---|---|
| Article number | e35636 |
| Pages (from-to) | e35636 |
| Journal | Cancer |
| Volume | 131 |
| Issue number | 1 |
| Early online date | Oct 10 2024 |
| DOIs | |
| State | Published - Jan 1 2025 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Keywords
- immune checkpoint inhibitors
- in-transit metastasis
- intralesional therapy
- isolated limb infusion
- isolated limb perfusion
- metastatic melanoma
- regional chemotherapy
- talimogene laherparepvec
- Humans
- Middle Aged
- Chemotherapy, Cancer, Regional Perfusion/methods
- Male
- Extremities/pathology
- Herpesvirus 1, Human
- Neoplasm Metastasis
- Melanoma/drug therapy
- Aged, 80 and over
- Biological Products
- Female
- Adult
- Aged
- Retrospective Studies
- Immune Checkpoint Inhibitors/administration & dosage
- Skin Neoplasms/drug therapy
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