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@ARTICLE{Sachpekidis:132856,
author = {C. Sachpekidis$^*$ and H. Goldschmidt$^*$ and K. Kopka$^*$
and A. Kopp-Schneider$^*$ and A.
Dimitrakopoulou-Strauss$^*$},
title = {{A}ssessment of glucose metabolism and cellular
proliferation in multiple myeloma: a first report on
combined 18{F}-{FDG} and 18{F}-{FLT} {PET}/{CT} imaging.},
journal = {EJNMMI Research},
volume = {8},
number = {1},
issn = {2191-219X},
address = {Berlin},
publisher = {Springer},
reportid = {DKFZ-2018-00499},
pages = {28},
year = {2018},
abstract = {Despite the significant upgrading in recent years of the
role of 18F-FDG PET/CT in multiple myeloma (MM) diagnostics,
there is a still unmet need for myeloma-specific
radiotracers. 3-Deoxy-3-[18F]fluorothymidine (18F-FLT) is
the most studied cellular proliferation PET agent,
considered a potentially new myeloma functional imaging
tracer. The aim of this pilot study was to evaluate 18F-FLT
PET/CT in imaging of MM patients, in the context of its
combined use with 18F-FDG PET/CT.Eight patients, four
suffering from symptomatic MM and four suffering from
smoldering MM (SMM), were enrolled in the study. All
patients underwent 18F-FDG PET/CT and 18F-FLT PET/CT imaging
by means of static (whole body) and dynamic PET/CT of the
lower abdomen and pelvis (dPET/CT) in two consecutive days.
The evaluation of PET/CT studies was based on qualitative
evaluation, semi-quantitative (SUV) calculation, and
quantitative analysis based on two-tissue compartment
modeling. 18F-FDG PET/CT demonstrated focal, 18F-FDG avid,
MM-indicative bone marrow lesions in five patients. In
contrary, 18F-FLT PET/CT showed focal, 18F-FLT avid,
myeloma-indicative lesions in only two patients. In total,
48 18F-FDG avid, focal, MM-indicative lesions were detected
with 18F-FDG PET/CT, while 17 18F-FLT avid, focal,
MM-indicative lesions were detected with 18F-FLT PET/CT. The
number of myeloma-indicative lesions was significantly
higher for 18F-FDG PET/CT than for 18F-FLT PET/CT. A common
finding was a mismatch of focally increased 18F-FDG uptake
and reduced 18F-FLT uptake (lower than the surrounding bone
marrow). Moreover, 18F-FLT PET/CT was characterized by high
background activity in the bone marrow compartment, further
complicating the evaluation of bone marrow lesions.
Semi-quantitative evaluation revealed that both SUVmean and
SUVmax were significantly higher for 18F-FLT than for
18F-FDG in both MM lesions and reference tissue. SUV values
were higher in MM lesions than in reference bone marrow for
both tracers.Despite the limited number of patients analyzed
in this pilot study, the first results of the trial indicate
that 18F-FLT does not seem suitable as a single tracer in MM
diagnostics. Further studies with a larger patient
population are warranted to generalize the herein presented
results.},
cin = {E060 / E030 / L101 / C060},
ddc = {610},
cid = {I:(DE-He78)E060-20160331 / I:(DE-He78)E030-20160331 /
I:(DE-He78)L101-20160331 / I:(DE-He78)C060-20160331},
pnm = {315 - Imaging and radiooncology (POF3-315)},
pid = {G:(DE-HGF)POF3-315},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29633046},
pmc = {pmc:PMC5891438},
doi = {10.1186/s13550-018-0383-7},
url = {https://inrepo02.dkfz.de/record/132856},
}