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Article: Dual-tracer PET/CT in the management of hepatocellular carcinoma

TitleDual-tracer PET/CT in the management of hepatocellular carcinoma
Authors
Issue Date24-Apr-2024
PublisherElsevier
Citation
JHEP Reports, 2024 How to Cite?
Abstract

Background & Aims

Combined 18F-fluorodeoxyglucose (FDG) and 11C-acetate (dual-tracer) positron emission tomography-computed tomography (PET-CT) is being increasingly performed for the management of hepatocellular carcinoma (HCC), although its role is not well defined. Therefore, we evaluated its effectiveness in (i) staging, (ii) characterization of indeterminate lesions on conventional imaging, and (iii) detection of HCC in patients with unexplained elevations in serum alpha-fetoprotein (AFP) levels.

Methods

We retrospectively assessed 525 consecutive patients from three tertiary centers between 2014 and 2020. For staging, we recorded new lesion detection rates, changes in the Barcelona Clinic Liver Cancer (BCLC) classification, and treatment allocation due to dual-tracer PET-CT. To characterize indeterminate lesions and unexplained elevation of serum AFP levels, the sensitivity and specificity of dual-tracer PET-CT in diagnosing HCC were evaluated. A Multidisciplinary external review and a cost-benefit analysis of patients for metastatic screening were also performed.

Results

Dual-tracer PET/CT identified new lesions in 14.3% of 273 staging patients, resulting in BCLC upstaging in 11.7% and treatment modifications in 7.7%. It upstaged 8.1% of 260 patients undergoing metastatic screening, with an estimated savings of US$495 per patient. It had a sensitivity and specificity of 80.7% (95% CI 71.2-88.6%) and 94.8% (95% CI 90.4-98.6%), respectively, for diagnosing HCC in 201 indeterminate lesions. It detected HCC in 45.1% of 51 patients with unexplained elevations in serum AFP concentrations. External review revealed substantial agreement between local and external image interpretation and patient assessment (n=273, κ=0.822; 95% CI 0.803-0.864).

Conclusions

Dual-tracer PET/CT provides additional value to conventional imaging in HCC patients by improving staging, confirming HCC diagnosis with high accuracy in patients with indeterminate lesions, and detecting HCC in patients with unexplained elevation of serum AFP.

• Impact and implications

• Dual-tracer PET-CT detected 12% more disease in HCC patients undergoing staging than CT or MRI, resulting in change in treatment in 8% of cases and a cost saving of US$495 per patient.

• It is also able to accurately detect HCC in high-risk cases where CT or MRI are equivocal or normal.

• Dual-tracer PET/CT provides additional value to conventional imaging in HCC patients by improving staging, confirming HCC diagnosis with high accuracy in patients with indeterminate lesions, and detecting HCC in patients with unexplained elevation of serum AFP.


Persistent Identifierhttp://hdl.handle.net/10722/343528
ISSN
2023 Impact Factor: 9.5
2023 SCImago Journal Rankings: 3.409

 

DC FieldValueLanguage
dc.contributor.authorChiu, Keith Wan Hang-
dc.contributor.authorChiang, Chi Leung-
dc.contributor.authorChan, Kenneth Sik Kwan-
dc.contributor.authorHui, Yuan-
dc.contributor.authorRen, Jingyun-
dc.contributor.authorWei, Xiaojuan-
dc.contributor.authorNg, Kwok Sing-
dc.contributor.authorLee, Ho Fun Victor-
dc.contributor.authorChia, Nam Hung-
dc.contributor.authorCheung, Tan-To-
dc.contributor.authorChan, Stephen-
dc.contributor.authorChan, Albert Chi-Yan-
dc.contributor.authorNg, Kwok Chai Kelvin-
dc.contributor.authorSeto, Wai Kay Walter-
dc.contributor.authorKhong, Pek-Lan-
dc.contributor.authorKong, Feng-Ming-
dc.date.accessioned2024-05-14T05:21:13Z-
dc.date.available2024-05-14T05:21:13Z-
dc.date.issued2024-04-24-
dc.identifier.citationJHEP Reports, 2024-
dc.identifier.issn2589-5559-
dc.identifier.urihttp://hdl.handle.net/10722/343528-
dc.description.abstract<h3>Background & Aims</h3><p>Combined 18F-fluorodeoxyglucose (FDG) and 11C-acetate (dual-tracer) positron emission tomography-computed tomography (PET-CT) is being increasingly performed for the management of hepatocellular carcinoma (HCC), although its role is not well defined. Therefore, we evaluated its effectiveness in (i) staging, (ii) characterization of indeterminate lesions on conventional imaging, and (iii) detection of HCC in patients with unexplained elevations in serum alpha-fetoprotein (AFP) levels.</p><h3>Methods</h3><p>We retrospectively assessed 525 consecutive patients from three tertiary centers between 2014 and 2020. For staging, we recorded new lesion detection rates, changes in the Barcelona Clinic Liver Cancer (BCLC) classification, and treatment allocation due to dual-tracer PET-CT. To characterize indeterminate lesions and unexplained elevation of serum AFP levels, the sensitivity and specificity of dual-tracer PET-CT in diagnosing HCC were evaluated. A Multidisciplinary external review and a cost-benefit analysis of patients for metastatic screening were also performed.</p><h3>Results</h3><p>Dual-tracer PET/CT identified new lesions in 14.3% of 273 staging patients, resulting in BCLC upstaging in 11.7% and treatment modifications in 7.7%. It upstaged 8.1% of 260 patients undergoing metastatic screening, with an estimated savings of US$495 per patient. It had a sensitivity and specificity of 80.7% (95% CI 71.2-88.6%) and 94.8% (95% CI 90.4-98.6%), respectively, for diagnosing HCC in 201 indeterminate lesions. It detected HCC in 45.1% of 51 patients with unexplained elevations in serum AFP concentrations. External review revealed substantial agreement between local and external image interpretation and patient assessment (n=273, κ=0.822; 95% CI 0.803-0.864).</p><h3>Conclusions</h3><p>Dual-tracer PET/CT provides additional value to conventional imaging in HCC patients by improving staging, confirming HCC diagnosis with high accuracy in patients with indeterminate lesions, and detecting HCC in patients with unexplained elevation of serum AFP.</p><p>• <strong>Impact and implications</strong></p><p>• Dual-tracer PET-CT detected 12% more disease in HCC patients undergoing staging than CT or MRI, resulting in change in treatment in 8% of cases and a cost saving of US$495 per patient.</p><p>• It is also able to accurately detect HCC in high-risk cases where CT or MRI are equivocal or normal.</p><p>• Dual-tracer PET/CT provides additional value to conventional imaging in HCC patients by improving staging, confirming HCC diagnosis with high accuracy in patients with indeterminate lesions, and detecting HCC in patients with unexplained elevation of serum AFP.</p>-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofJHEP Reports-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleDual-tracer PET/CT in the management of hepatocellular carcinoma-
dc.typeArticle-
dc.identifier.doi10.1016/j.jhepr.2024.101099-
dc.identifier.eissn2589-5559-
dc.identifier.issnl2589-5559-

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