Pituitary & hypothalamus

BRAF–MEK Inhibition in Newly Diagnosed Papillary Craniopharyngiomas

N Engl J MedPublished Single-group phase 2 trial

Authors' conclusion

In this small, single-group study involving patients with papillary craniopharyngiomas, 15 of 16 patients had a partial response or better to the BRAF-MEK inhibitor combination vemurafenib-cobimetinib.

Study context

Population
Patients with BRAF-mutated papillary craniopharyngiomas, no previous radiation therapy, measurable disease
Participants
16 patients
Outcome
Objective response by centrally determined volumetric data
Follow-up
4 months

Main finding

As reported in the abstract

Durable objective partial response or better

Durable objective partial response or better (of 16 patients)

15

94%; 95% CI, 70 to 100

Further findings

Tumour volume reduction

Median reduction in tumour volume
91% (range, 68 to 99)

Progression-free survival · 12 and 24 months

PFS at 12 months
87% (95% CI, 57 to 98)
PFS at 24 months
58% (95% CI, 10 to 89)
Disease progression during follow-up after therapy discontinued
3 patients
Deaths
0
  • Median follow-up 22 months (95% CI, 19 to 30)

Safety

Adverse events

Grade 3 AEs at least possibly treatment-related
12 patients
Grade 3 rash
6 patients
Grade 4 AEs (hyperglycemia 1, increased creatine kinase 1)
2 patients
Discontinued owing to AEs
3 patients
Sole non-responder stopped after 8 days owing to toxic effects
1 patient

Original publication

BRAF–MEK Inhibition in Newly Diagnosed Papillary Craniopharyngiomas. N Engl J Med. Published 13 July 2023. doi:10.1056/nejmoa2213329

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