Evaluation of intratumoural heterogeneity on ¹⁸F-FDG PET/CT for characterization of peripheral nerve sheath tumours in neurofibromatosis type 1
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Evaluation of intratumoural heterogeneity on ¹⁸F-FDG PET/CT for characterization of peripheral nerve sheath tumours in neurofibromatosis type 1. / Salamon, Johannes; Derlin, Thorsten; Bannas, Peter; Busch, Jasmin D; Herrmann, Jochen; Bockhorn, Maximilian; Hagel, Christian; Friedrich, Reinhard E; Adam, Gerhard; Mautner, Victor-Felix.
In: EUR J NUCL MED MOL I, Vol. 40, No. 5, 01.05.2013, p. 685-92.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Evaluation of intratumoural heterogeneity on ¹⁸F-FDG PET/CT for characterization of peripheral nerve sheath tumours in neurofibromatosis type 1
AU - Salamon, Johannes
AU - Derlin, Thorsten
AU - Bannas, Peter
AU - Busch, Jasmin D
AU - Herrmann, Jochen
AU - Bockhorn, Maximilian
AU - Hagel, Christian
AU - Friedrich, Reinhard E
AU - Adam, Gerhard
AU - Mautner, Victor-Felix
PY - 2013/5/1
Y1 - 2013/5/1
N2 - PURPOSE: The aim of the study was to evaluate the potential usefulness of intratumoural tracer uptake heterogeneity on (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT as compared to a cut-off maximum standardized uptake value (SUVmax) for characterization of peripheral nerve sheath tumours (PNSTs) in neurofibromatosis type 1 (NF1).METHODS: Fifty patients suffering from NF1 were examined by (18)F-FDG PET/CT. Intralesional tracer uptake was analysed qualitatively and semi-quantitatively by measuring the mean and maximum SUV. Uptake heterogeneity was graded qualitatively using a three-point scale and semi-quantitatively by calculating an SUV-based heterogeneity index (HISUV). Cohen's κ was used to determine inter- and intra-rater agreement. Histopathological evaluation and clinical as well as radiological follow-up examinations served as the reference standards.RESULTS: A highly significant correlation between the degree of intratumoural uptake heterogeneity on (18)F-FDG PET and malignant transformation of PNSTs was observed (p < 0.0001). Semi-quantitative HISUV was significantly higher in malignant PNSTs (MPNSTs) than in benign tumours (p = 0.0002). Both intralesional heterogeneity and SUVmax could be used to identify malignant tumours with a sensitivity of 100 %. Cohen's κ was 0.86 for inter-rater agreement and 0.88 for intra-rater agreement on heterogeneity.CONCLUSION: MPNSTs in patients with NF1 demonstrate considerable intratumoural uptake heterogeneity on (18)F-FDG PET/CT. Assessment of tumour heterogeneity is highly reproducible. Both tumour heterogeneity and a cut-off SUVmax may be used to sensitively identify malignant PNSTs, but the specificity is higher for the latter. A combination of both methods leads to a non-significant improvement in diagnostic performance.
AB - PURPOSE: The aim of the study was to evaluate the potential usefulness of intratumoural tracer uptake heterogeneity on (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT as compared to a cut-off maximum standardized uptake value (SUVmax) for characterization of peripheral nerve sheath tumours (PNSTs) in neurofibromatosis type 1 (NF1).METHODS: Fifty patients suffering from NF1 were examined by (18)F-FDG PET/CT. Intralesional tracer uptake was analysed qualitatively and semi-quantitatively by measuring the mean and maximum SUV. Uptake heterogeneity was graded qualitatively using a three-point scale and semi-quantitatively by calculating an SUV-based heterogeneity index (HISUV). Cohen's κ was used to determine inter- and intra-rater agreement. Histopathological evaluation and clinical as well as radiological follow-up examinations served as the reference standards.RESULTS: A highly significant correlation between the degree of intratumoural uptake heterogeneity on (18)F-FDG PET and malignant transformation of PNSTs was observed (p < 0.0001). Semi-quantitative HISUV was significantly higher in malignant PNSTs (MPNSTs) than in benign tumours (p = 0.0002). Both intralesional heterogeneity and SUVmax could be used to identify malignant tumours with a sensitivity of 100 %. Cohen's κ was 0.86 for inter-rater agreement and 0.88 for intra-rater agreement on heterogeneity.CONCLUSION: MPNSTs in patients with NF1 demonstrate considerable intratumoural uptake heterogeneity on (18)F-FDG PET/CT. Assessment of tumour heterogeneity is highly reproducible. Both tumour heterogeneity and a cut-off SUVmax may be used to sensitively identify malignant PNSTs, but the specificity is higher for the latter. A combination of both methods leads to a non-significant improvement in diagnostic performance.
KW - Adolescent
KW - Adult
KW - Aged
KW - Biological Transport
KW - Child
KW - Child, Preschool
KW - Female
KW - Fluorodeoxyglucose F18
KW - Humans
KW - Male
KW - Middle Aged
KW - Multimodal Imaging
KW - Nerve Sheath Neoplasms
KW - Neurofibromatosis 1
KW - Positron-Emission Tomography
KW - Reproducibility of Results
KW - Retrospective Studies
KW - Tomography, X-Ray Computed
KW - Young Adult
U2 - 10.1007/s00259-012-2314-6
DO - 10.1007/s00259-012-2314-6
M3 - SCORING: Journal article
C2 - 23232507
VL - 40
SP - 685
EP - 692
JO - EUR J NUCL MED MOL I
JF - EUR J NUCL MED MOL I
SN - 1619-7070
IS - 5
ER -