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Dosimetry based on 99mTc-macroaggregated albumin SPECT/CT accurately predicts tumor response and survival in hepatocellular carcinoma patients treated with 90Y-loaded glass microspheres: preliminary results.
Garin, Etienne; Lenoir, Laurence; Rolland, Yan; Edeline, Julien; Mesbah, Habiba; Laffont, Sophie; Porée, Philippe; Clément, Bruno; Raoul, Jean-Luc; Boucher, E.
Afiliação
  • Garin E; Department of Nuclear Medicine, Comprehensive Cancer Institute Eugène Marquis, CS 44229, F-35042 Rennes, France. e.garin@rennes.fnclcc.fr
J Nucl Med ; 53(2): 255-63, 2012 Feb.
Article em En | MEDLINE | ID: mdl-22302962
UNLABELLED: Radioembolization of liver cancers using (90)Y-loaded microspheres is experiencing more widespread use. However, few data are available concerning the doses delivered to the tumors and the healthy liver. This retrospective study was conducted to calculate the tumor dosimetry (planned tumor dose [T(plan) D]) and nontumor dosimetry in patients treated by (90)Y-loaded glass microspheres and determine whether tumor dosimetry could predict response and survival. METHODS: Thirty-six patients with hepatocellular carcinoma (HCC), including 16 with portal vein thrombosis (PVT), were treated with (90)Y-loaded glass microspheres. The T(plan) D and the dose delivered to the injected healthy liver were calculated using a quantitative analysis of the (99m)Tc-macroaggregated albumin ((99m)Tc-MAA) SPECT/CT exam. Responses were assessed after 3 mo, using the criteria of the European Association for the Study of the Liver. Progression-free survival (PFS) and overall survival (OS) were evaluated using Kaplan-Meier tests. RESULTS: The response rate was 69% for the overall population and 75% for the PVT patients. The dose delivered to the tumor was the only parameter associated with response with multivariate analysis (P = 0.019). A threshold T(plan) D value of 205 Gy was predictive of response, with a sensitivity of 100% and an accuracy of 91%. Quantitative (99m)Tc-MAA SPECT/CT allowed us to increase the injected activity for 4 patients with large lesions. PFS was only 5.2 mo and OS 9 mo when using a T(plan) D of less than 205 Gy versus 14 mo (P = 0.0003) and 18 mo (P = 0.0322), respectively, with a T(plan) D of 205 Gy or more. CONCLUSION: Quantitative (99m)Tc-MAA SPECT/CT is predictive of response, PFS, and OS. Dosimetry based on (99m)Tc-MAA SPECT/CT can be used for the selection of patients and for an adaptation of treatment planning, especially in selected patients (particularly in the case of large tumors). These results also confirm the efficacy and safety of (90)Y-loaded microspheres in treating HCC, even in the presence of PVT (and especially when (99m)Tc-MAA uptake is seen inside the PVT).
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tomografia Computadorizada por Raios X / Agregado de Albumina Marcado com Tecnécio Tc 99m / Carcinoma Hepatocelular / Tomografia por Emissão de Pósitrons / Embolização Terapêutica / Imagem Multimodal / Vidro / Neoplasias Hepáticas / Microesferas Tipo de estudo: Observational_studies / Prognostic_studies / Risk_factors_studies Limite: Aged / Female / Humans / Male Idioma: En Revista: J Nucl Med Ano de publicação: 2012 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tomografia Computadorizada por Raios X / Agregado de Albumina Marcado com Tecnécio Tc 99m / Carcinoma Hepatocelular / Tomografia por Emissão de Pósitrons / Embolização Terapêutica / Imagem Multimodal / Vidro / Neoplasias Hepáticas / Microesferas Tipo de estudo: Observational_studies / Prognostic_studies / Risk_factors_studies Limite: Aged / Female / Humans / Male Idioma: En Revista: J Nucl Med Ano de publicação: 2012 Tipo de documento: Article