Positron Emission Tomography as a Surrogate Marker for Evaluation of Treatment Response in Patients with Desmoid Tumors under Therapy with Imatinib

We used 2-deoxy-2-[18F] fluoro-D-glucose (FDG) positron emission tomography (PET) to evaluate patients with desmoid tumors undergoing therapy with imatinib. The study included 22 patients with progressive disease (PD) of a biopsy proven desmoid tumor treated orally with imatinib 800 mg daily. Patien...

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Veröffentlicht in:BioMed research international 2013-01, Vol.2013 (2013), p.1-7
Hauptverfasser: Sachpekidis, Christos, Strauss, Ludwig G., Pilz, Lothar R., Dimitrakopoulou-Strauss, Antonia, Kasper, Bernd, Hohenberger, Peter
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container_issue 2013
container_start_page 1
container_title BioMed research international
container_volume 2013
creator Sachpekidis, Christos
Strauss, Ludwig G.
Pilz, Lothar R.
Dimitrakopoulou-Strauss, Antonia
Kasper, Bernd
Hohenberger, Peter
description We used 2-deoxy-2-[18F] fluoro-D-glucose (FDG) positron emission tomography (PET) to evaluate patients with desmoid tumors undergoing therapy with imatinib. The study included 22 patients with progressive disease (PD) of a biopsy proven desmoid tumor treated orally with imatinib 800 mg daily. Patients were examined using PET prior to onset of therapy and during treatment. Restaging was performed in parallel using computed tomography (CT) and/or magnetic resonance imaging (MRI). Outcome of 22 evaluable patients was as follows: five patients with partial response (PR); twelve patients with stable disease (SD) accounting for 77% with non-progressive disease; five patients showed PD. A 30% decrease of the mean average standardized uptake value (SUV) of sequential PET examinations could be demonstrated; no patient demonstrated a substantial increase in SUV. Patients with PR/SD were matched to a group of nonprogressive disease and tested versus PD. The initial average SUV and SUVmax seem to be candidates for a response prediction with an approximate P-value of 0.06553 and 0.07785, respectively. This is the first larger series of desmoid patients monitored using PET showing that early SUV changes may help to discriminate responders from nonresponders and, thus, to decide whether imatinib therapy should be continued.
doi_str_mv 10.1155/2013/389672
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The study included 22 patients with progressive disease (PD) of a biopsy proven desmoid tumor treated orally with imatinib 800 mg daily. Patients were examined using PET prior to onset of therapy and during treatment. Restaging was performed in parallel using computed tomography (CT) and/or magnetic resonance imaging (MRI). Outcome of 22 evaluable patients was as follows: five patients with partial response (PR); twelve patients with stable disease (SD) accounting for 77% with non-progressive disease; five patients showed PD. A 30% decrease of the mean average standardized uptake value (SUV) of sequential PET examinations could be demonstrated; no patient demonstrated a substantial increase in SUV. Patients with PR/SD were matched to a group of nonprogressive disease and tested versus PD. The initial average SUV and SUVmax seem to be candidates for a response prediction with an approximate P-value of 0.06553 and 0.07785, respectively. 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subjects Adult
Age
Aged
Benzamides - therapeutic use
Biomarkers
Biopsy
Care and treatment
Female
Fibromas
Fibromatosis, Aggressive - diagnostic imaging
Fibromatosis, Aggressive - drug therapy
Fluorodeoxyglucose F18
Humans
Imatinib Mesylate
Male
Medical imaging
Medical research
Medical treatment
Middle Aged
Mutation
PET imaging
Piperazines - therapeutic use
Positron-Emission Tomography
Pyrimidines - therapeutic use
Radiation therapy
Studies
Treatment Outcome
Tumors
Young Adult
title Positron Emission Tomography as a Surrogate Marker for Evaluation of Treatment Response in Patients with Desmoid Tumors under Therapy with Imatinib
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