PT  - JOURNAL ARTICLE
AU  - Evert-Jan P.A. Vonken
AU  - Rutger C.G. Bruijnen
AU  - Tom J. Snijders
AU  - Tatjana Seute
AU  - Marnix G.E.H. Lam
AU  - Bart de Keizer
AU  - Arthur Johannes Anthonius Theodorus Braat
TI  - Intra-arterial administration boosts <sup>177</sup>Lu-HA-DOTATATE accumulation in salvage meningioma patients
AID  - 10.2967/jnumed.121.262491
DP  - 2021 Jul 01
TA  - Journal of Nuclear Medicine
PG  - jnumed.121.262491
4099  - http://jnm.snmjournals.org/content/early/2021/07/22/jnumed.121.262491.short
4100  - http://jnm.snmjournals.org/content/early/2021/07/22/jnumed.121.262491.full
AB  - INTRODUCTION: Intravenous 177Lu-(HA-)DOTATATE has shown promising results for the treatment of surgery- and radiotherapy-refractory meningiomas. We aimed to investigate the added value of intra-arterial administration. METHODS: Patients underwent at least one intravenous 177Lu-HA-DOTATATE treatment first and subsequent intra-arterial cycles. In(tra)-patient comparison was based on post-treatment 177Lu-HA-DOTATATE imaging 24 hours post-injection. Technical success rates and adverse events were recorded. RESULTS: Four patients provided informed consent. Technical success rate was 100% and no angiography related or unexpected adverse events occurred. Intra-patient comparison showed an increased target lesion accumulation on both planar imaging (mean +220%) and SPECT/CT (mean +398%) after intra-arterial administration compared to intravenous. No unexpected adverse events during follow-up occurred. CONCLUSION: Intra-arterial PRRT significantly increases tracer accumulation, and is a safe and promising improvement for salvage meningioma patients. Future prospective studies on intra-arterial PRRT are needed to determine gain on efficacy and survival.