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Shankar Siva: OMET trial in oligometastatic HNSCC
Mar 28, 2025, 14:03

Shankar Siva: OMET trial in oligometastatic HNSCC

Shankar Siva, Radiation Oncologist at Peter MacCallum Cancer Centre, shared a post on X:

“OMET trial (GORTEC 2014-04) in oligometastatic HNSCC.

N=69, SABR alone vs SABR + chemo + cetuximab.

Key finding:

  • Similar 1-year OS without QoL (SABR 55.2% vs chemo-SABR 53.3%).
  • SABR alone had toxicity and QoL impact.
  • Gr 3–4 tox: 8.8% (SABR alone) vs 60%.

Shankar Siva: OMET trial in oligometastatic HNSCC

Survival Without Quality of Life Deterioration in the GORTEC 2014-04 “OMET” Randomized Phase 2 Trial in Patients with Head and Neck Cancer with Oligometastases using Stereotactic Ablative Radiation Therapy (SABR) alone or Chemotherapy and SABR.

Authors: Juliette Thariat, et al.

Shankar Siva: OMET trial in oligometastatic HNSCC

Phase II randomized design:

  • 1–3 oligometastases, mostly lung.
  • Median OS ~42 mo both arms.
  • QoL deterioration (median drop):

– SABR: 16.7 patients.

– Chemo-SABR: 50 patients.

QoL assessed with EORTC QLQ-C30.”

Shankar Siva: OMET trial in oligometastatic HNSCC

Toxicity snapshot:

Grade ≥3 toxicity:

  • 60% with chemo vs 8.8% with SABR-only.
  • No grade 5 events.
  • Chemo toxicities: anemia, nausea, mucositis, hypomagnesemia, etc.

QoL declines closely linked to non-haem grade ≥3 toxicities.”

Bottom line for clinicians:

In select patients with oligometastatic HNSCC, SABR alone offers comparable survival with toxicity and better QoL.

Repeated SABR feasible at relapse SABR-only arm also shown to be cost-efficient.

Full paper.

Sue YomASTRO upcoming podcast for APRIL 2025.”