Trial reportThe oncologist2026
SERENA-6 visual patient-reported outcomes and safety: camizestrant for emerging ESR1m advanced breast cancer during first-line endocrine-based therapy.
Trial report in The oncologist, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04964934 (A Phase III, Double-blind, Randomised Study to Assess Switching to AZD9833), which is not on this map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Phase III, Double-blind, Randomised Study to Assess Switching to AZD9833 (a Next Generation, Oral SERD) + CDK4/6 Inhibitor vs Continuing Aromatase Inhibitor (Letrozole or Anastrozole)+ CDK4/6 Inhibitor in HR+/HER2-MBC Patients With Detectable ESR1Mutation Without Disease Progression During 1L Treatment With Aromatase Inhibitor+ CDK4/6 Inhibitor- A ctDNA Guided Early Switch Study
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Authors and funding
26 authors.
Funding
Abstract
backgroundWe report ophthalmological assessments, patient-reported visual symptoms/functioning, and characterization of visual effect AEs from the SERENA-6 study. MATERIALS AND
methodsThis double-blind, placebo-controlled phase III study included 315 patients with ER-positive advanced breast cancer receiving first-line aromatase inhibitor (AI)+CDK4/6 inhibitor (CDK4/6i). Patients with emerging ESR1 mutations in ctDNA and no radiological progression were randomized 1:1 to switch to camizestrant+CDK4/6i or continue AI+CDK4/6i. Predefined group term visual effect AEs were graded (NCI-CTCAE v5.0). Ophthalmological assessments were conducted at baseline, as indicated, and at the end of treatment. Analyses of patient-reported visual effects/functioning were exploratory.
resultsVisual effect AEs were reported in 49 (31.6%) patients receiving camizestrant+CDK4/6i and 25 (16.1%) patients receiving AI+CDK4/6i; 90% were grade 1; none led to discontinuation. No changes in visual acuity or ocular structure were observed. Patient-reported visual effects occurred early (by week 2) and were reversible post-treatment. The proportion of patients in the camizestrant+CDK4/6i and AI+CDK4/6i arm reporting short-lived visual effects (<1 minute) ranged from 60% to 67% vs 50% to 69%, respectively; visual effects causing no/a low degree of bother: 78%-88% vs 50%-75%, respectively. During treatment, visual functioning was comparable to baseline and between arms.
conclusionIf experienced, patient-reported visual effects (including photopsia) with camizestrant+CDK4/6i were short-lived and reversible post-treatment. Visual effect AEs with camizestrant+CDK4/6i were mostly mild and did not require treatment discontinuation or ophthalmological management. There was no impact on ocular structure, function, or visual acuity; visual effects had little/no impact on daily functioning. These findings support clinical decision-making by further characterizing the visual safety profile of camizestrant in this setting. CLINICAL
trial registrationClinicalTrials.gov, NCT04964934.
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