Temozolomide reconsidered: Real-World evidence in resistant melanoma cases

Jean Henri Maselli-Schoueri1, Erika Martinez1, Erick Lagos1

  • 1Princess Margaret Cancer Centre-Division of Medical Oncology & Hematology-Department of Medicine-Melanoma and Skin Cancer, University of Toronto, Toronto, ON M5G 2M9, Canada.

The Oncologist
|May 9, 2026
PubMed

Insights

Temozolomide shows promise as a subsequent therapy for advanced cancers after immune checkpoint inhibitors fail. Two patients experienced significant clinical responses and good tolerability with single-agent temozolomide treatment.

Area of Science:

  • Oncology
  • Immunotherapy
  • Cancer Treatment

Background:

  • Immune checkpoint inhibitors (ICIs) have revolutionized cancer care but subsequent treatment options are limited.
  • Limited efficacy, cost, and patient health often restrict choices after ICI failure.
  • Temozolomide is being reconsidered as a potential bridge therapy, especially with anti-PD-1 agents.

Purpose of the Study:

  • To report two cases of single-agent temozolomide as a subsequent therapy.
  • To assess clinical response and tolerability in patients progressing on prior systemic therapies including ICIs.
  • To explore the role of temozolomide in modern cancer treatment sequencing.

Main Methods:

  • Case report of two patients with advanced malignancies.
  • Patients received single-agent temozolomide after disease progression on prior systemic treatments.
  • Prior treatments included anti-PD-1 therapy and, in one case, targeted therapy.

Main Results:

  • Both patients demonstrated meaningful clinical responses to temozolomide.
  • Temozolomide was well-tolerated in both cases.
  • These findings suggest potential synergistic activity and tolerability.

Conclusions:

  • Single-agent temozolomide can be an effective and tolerable subsequent therapy after progression on ICIs.
  • These cases support further investigation of temozolomide in contemporary cancer treatment strategies.
  • Temozolomide may offer a viable option when other treatments are exhausted.

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