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Annals of Nuclear Medicine
Erschienen in: Annals of Nuclear Medicine 7/2018

04.07.2018 | Original Article

Is 18F-FDG PET/CT useful for the differential diagnosis of solitary pulmonary nodules in patients with idiopathic pulmonary fibrosis?

verfasst von: Suk Hyun Lee, Changhwan Sung, Hyo Sang Lee, Hee-young Yoon, Soo-Jong Kim, Jungsu S. Oh, Jin Woo Song, Mi Young Kim, Jin-Sook Ryu

Erschienen in: Annals of Nuclear Medicine | Ausgabe 7/2018

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Abstract

Objective

Idiopathic pulmonary fibrosis (IPF) is associated with an increased incidence of lung cancer, but patients with IPF often have poor pulmonary function and are vulnerable to pneumothorax and so using an invasive procedure to diagnose a single nodule detected on chest CT risks a critical adverse outcome. 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) is recognized to be useful for differentiating between benign and malignant solitary pulmonary nodules (SPN) in patients without IPF, but its diagnostic accuracy has not been investigated in patients with IPF. In this study, therefore, we investigated whether 18F-FDG PET/CT is useful for the differential diagnosis of SPNs in patients with IPF.

Methods

From the IPF patient cohort of our institution, we retrospectively reviewed 55 patients (54 men, 1 woman; age 67.8 ± 7.6 years) with an SPN sized 8–30 mm (mean 18.5 ± 5.7 mm) who underwent chest CT followed by 18F-FDG PET/CT between April 2004 and March 2016. The 18F-FDG uptake of the SPN was analyzed visually and semiquantitatively, and these determinations were compared with the final diagnosis obtained by pathology (n = 52) or imaging follow-up (n = 3).

Results

The final diagnoses showed that 41 (75%) of the SPNs were malignant (21 squamous cell carcinomas, 9 adenocarcinomas, 5 small-cell carcinomas, 4 mixed-type carcinomas, 1 large-cell neuroendocrine carcinoma, and 1 sarcoid carcinoma) and 14 (25%) were benign. The determination of malignant SPNs by visual analysis of the PET/CT images had a sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of 98, 86, 95, and 92%, respectively. The semiquantitative analysis using a maximum standardized uptake value of 2.0 as the cut-off had a sensitivity, specificity, PPV, and NPV of 95, 93, 98, and 87%, respectively.

Conclusions

18F-FDG PET/CT is useful for differentiating benign and malignant SPNs in patients with IPF, as it is for patients without IPF.
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Metadaten
Titel
Is 18F-FDG PET/CT useful for the differential diagnosis of solitary pulmonary nodules in patients with idiopathic pulmonary fibrosis?
verfasst von
Suk Hyun Lee
Changhwan Sung
Hyo Sang Lee
Hee-young Yoon
Soo-Jong Kim
Jungsu S. Oh
Jin Woo Song
Mi Young Kim
Jin-Sook Ryu
Publikationsdatum
04.07.2018
Verlag
Springer Japan
Erschienen in
Annals of Nuclear Medicine / Ausgabe 7/2018
Print ISSN: 0914-7187
Elektronische ISSN: 1864-6433
DOI
https://doi.org/10.1007/s12149-018-1273-9

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