open access

Vol 25, No 4 (2020)
Original research articles
Published online: 2020-07-01
Submitted: 2020-03-09
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Dual-time-point PET/CT study protocol can improve the larynx cancer diagnosis

Agata Karolina Pietrzak, Joanna Kazmierska, Andrzej Marszalek, Pawel Golusinski, Aleksandra Heydrych, Katarzyna Wiechec, Witold Cholewinski
DOI: 10.1016/j.rpor.2020.04.013
·
Rep Pract Oncol Radiother 2020;25(4):533-538.

open access

Vol 25, No 4 (2020)
Original research articles
Published online: 2020-07-01
Submitted: 2020-03-09

Abstract

Aim

To evaluate whether the sequential dual-time-point fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (DTP 18F-FDG PET/CT) study improves the differential diagnosis in the larynx.

Background

In some cases, the clinical and metabolic similarity of laryngitis and larynx cancer make differential diagnostics difficult when performing standard 18F-FDG PET/CT examinations; therefore, an additional study protocol performance seems to be of reasonable value.

Materials and methods

90 patients (mean age: 61±11 years, range: 41–84 years): 23 women (mean age: 63±10 years, range: 51–84 years) and 67 men (mean age: 61±11 years, range: 41–80 years) underwent delayed 18F-FDG PET/CT examinations at 60 and 90min post intravenous injection (p.i.) of the radiopharmaceutical 18F-FDG. We compared the metabolic activity of 90 structures divided into following groups: normal larynx (30 patients), laryngitis (30 lesions) and larynx cancer (30 tumors) with maximal and mean standardized uptake value (SUVmax, SUVmean) and the retention index (RI-SUVmax). We used the receiver operating characteristics (ROC) curve to evaluate the SUVmax cut-off values.

Results

The SUVmax cut-off value at 60 and 90min p.i. of 2.3 (sensitivity/specificity: 96.4%/100%) and 2.4 (94.2%/100%), respectively, distinguished normal and abnormal metabolic activity in the larynx. When laryngitis and tumors were compared, the SUVmax cut-off values obtained after initial and delayed imaging were 3.6 (87.5%/52.0%) and 6.1 (58.3%/84%), respectively. The RI-SUVmax of 1.3% (71.4%/88.1%) suggested abnormality, while RI-SUVmax of 6.6%, malignant etiology (75.0%/80.0%).

Conclusions

In this study, the sequential DTP scanning protocol improved the sensitivity and specificity of the PET/CT method in terms of differential diagnosis within the larynx.

Abstract

Aim

To evaluate whether the sequential dual-time-point fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (DTP 18F-FDG PET/CT) study improves the differential diagnosis in the larynx.

Background

In some cases, the clinical and metabolic similarity of laryngitis and larynx cancer make differential diagnostics difficult when performing standard 18F-FDG PET/CT examinations; therefore, an additional study protocol performance seems to be of reasonable value.

Materials and methods

90 patients (mean age: 61±11 years, range: 41–84 years): 23 women (mean age: 63±10 years, range: 51–84 years) and 67 men (mean age: 61±11 years, range: 41–80 years) underwent delayed 18F-FDG PET/CT examinations at 60 and 90min post intravenous injection (p.i.) of the radiopharmaceutical 18F-FDG. We compared the metabolic activity of 90 structures divided into following groups: normal larynx (30 patients), laryngitis (30 lesions) and larynx cancer (30 tumors) with maximal and mean standardized uptake value (SUVmax, SUVmean) and the retention index (RI-SUVmax). We used the receiver operating characteristics (ROC) curve to evaluate the SUVmax cut-off values.

Results

The SUVmax cut-off value at 60 and 90min p.i. of 2.3 (sensitivity/specificity: 96.4%/100%) and 2.4 (94.2%/100%), respectively, distinguished normal and abnormal metabolic activity in the larynx. When laryngitis and tumors were compared, the SUVmax cut-off values obtained after initial and delayed imaging were 3.6 (87.5%/52.0%) and 6.1 (58.3%/84%), respectively. The RI-SUVmax of 1.3% (71.4%/88.1%) suggested abnormality, while RI-SUVmax of 6.6%, malignant etiology (75.0%/80.0%).

Conclusions

In this study, the sequential DTP scanning protocol improved the sensitivity and specificity of the PET/CT method in terms of differential diagnosis within the larynx.

Get Citation

Keywords

18F fluorodeoxyglucose; Positron emission tomography; Larynx cancer

About this article
Title

Dual-time-point PET/CT study protocol can improve the larynx cancer diagnosis

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 25, No 4 (2020)

Pages

533-538

Published online

2020-07-01

DOI

10.1016/j.rpor.2020.04.013

Bibliographic record

Rep Pract Oncol Radiother 2020;25(4):533-538.

Keywords

18F fluorodeoxyglucose
Positron emission tomography
Larynx cancer

Authors

Agata Karolina Pietrzak
Joanna Kazmierska
Andrzej Marszalek
Pawel Golusinski
Aleksandra Heydrych
Katarzyna Wiechec
Witold Cholewinski

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