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- Title
Efficacy of using a standard activity of <sup>131</sup>I-MIBG therapy in patients with disseminated neuroendocrine tumours.
- Authors
Navalkissoor, Shaunak; Alhashimi, Dona M.; Quigley, Ann-Marie; Caplin, Martyn E.; Buscombe, John R.
- Abstract
The aim of this analysis was to evaluate the response to standard activity of 131I-meta-iodobenzylguanidine (MIBG) in patients with disseminated neuroendocrine tumours (NETs), comparing overall survival of patients with symptomatic response, tumour size (as assessed by CT) and relevant plasma tumour markers. A retrospective review of patients who had undergone 131I-MIBG treatment between March 2001 and December 2006 was carried out. The administered activity of 131I-MIBG was 5.5 GBq (NETs) and 7 GBq (phaeochromocytoma). Three cycles of treatment were planned with an interval of 10–12 weeks. A pre-therapy scan with 123I-MIBG was performed to ascertain appropriate biodistribution. Thirty-eight patients were identified. Only two patients developed significant bone marrow suppression. Symptomatic response: data were available in 37 of 38 patients: 15 patients had improved symptoms, 19 had no improvement in symptoms and 3 were asymptomatic. In those with a symptomatic response, the median overall survival was 58 months vs no response of 20.0 months ( p = 0.001). CT response: in those with stable disease, the median overall survival was 58 months compared with progressive disease of 16.0 months. The difference between these groups was significant ( p = 0.006). Hormonal response: this was available in only 20 of 38 patients. The median overall survival was the same for patients that had increased hormone levels and patients that had stable/decreased hormone levels (48 months). Standard activity 131I-MIBG is well tolerated. Symptomatic response to treatment is a significant predictor of overall survival. Whilst CT response also appears to predict survival, hormonal levels do not appear to correlate with survival.
- Publication
European Journal of Nuclear Medicine & Molecular Imaging, 2010, Vol 37, Issue 5, p904
- ISSN
1619-7070
- Publication type
Academic Journal
- DOI
10.1007/s00259-009-1326-3