Locally increased uptake of fluorine-18-fluorodeoxyglucose after intracavitary administration of iodine-131-labeled antibody for primary brain tumors.
J Nucl Med
; 39(8): 1376-80, 1998 Aug.
Article
en En
| MEDLINE
| ID: mdl-9708511
ABSTRACT
UNLABELLED After the intracavitary administration of 131I-labeled monoclonal antibody for treatment of primary brain tumors after surgical resection, a persistent rim of 18F-fluorodeoxyglucose (FDG) accumulation surrounding the cavity can be observed on PET. This rim, although it accumulates more FDG than adjacent normal brain tissue, is not necessarily associated with tumor. In our study, we examine the characteristics of the rim that indicate persistent tumor and tumor progression. METHODS:
Sequential PET studies obtained after treatment in 10 patients were reviewed and the results correlated with dosimetry and post-treatment histologic diagnoses.RESULTS:
The rim of FDG accumulation was seen on the first post-treatment scan obtained 1-3 mo after therapy and persisted unchanged over the 2-26 mo follow-up period. Pathologically, the nonmalignant rim was associated with marked increase of macrophage infiltrates. Nodularity of the rim was associated with tumor.CONCLUSION:
Our study demonstrates that a rim of FDG accumulation is seen after intracavitary administration of 131I-labeled monoclonal antibody therapy independent of the presence of malignant disease. Malignant recurrence is suggested by the development of new nodularity in the rim of FDG accumulation.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Encéfalo
/
Neoplasias Encefálicas
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Radioisótopos de Flúor
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Tomografía Computarizada de Emisión
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Radioinmunoterapia
/
Glioblastoma
/
Radiofármacos
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Fluorodesoxiglucosa F18
/
Radioisótopos de Yodo
Límite:
Adolescent
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Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Nucl Med
Año:
1998
Tipo del documento:
Article
País de afiliación:
Reino Unido