"Tail" signs associated with pulmonary lesions: critical reappraisal

Hill, CA

doi:10.2214/ajr.139.2.311

Cited by 23 publications

(4 citation statements)

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“…Therefore, pleural retraction was both a preoperative and intraoperative predictive factor. Generally, pleural retraction has not been seen as a significant finding for discrimination between benign and malignant pulmonary nodules (22,23). However, a recent study reported that patients with IA and GGO lesions have a higher incidence of pleural retraction than those with AIS/MIA (17).…”

Section: Discussionmentioning

confidence: 99%

Pure ground-glass opacity on chest computed tomography: predictive factors for invasive adenocarcinoma

et al. 2016

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Objective The purpose of our study was to assess the differentially diagnostic value of radiographic characteristics of pure ground glass nodules (GGNs) between minimally invasive adenocar-cinoma and non-invasive neoplasm. Methods Sixty-seven pure GGNs (28 minimally invasive adenocarcinomas (MIA) and 39 pre-invasive lesions) were analyzed from June 2012 to June 2015. Pre-invasive lesions consisted of 15 atypical adenomatous hyperplasia (AAH) and 24 adenocarcinomas in situ (AIS). High-resolution computed tomography (HRCT) features and volume of MIA and pre-invasive lesions were assessed. Fisher exact test, independent sample t test, Mann-Whitney U test and receiver operating characteristic (ROC) curve analysis were performed. Results Inter-observer agreement indexes for the diameter, mean HRCT attenuations and volume of pure GGNs were all high (ICC>0.75). Univariate analyses showed that lesion diameter, mean HRCT attenuation, and volume value differed significantly between two groups. Among HRCT findings, GGN shape as round or oval (F = 13.456, P = 0.002) and lesion borders as smooth or notched (F = 15.742, P = 0.001) frequently appeared in pre-invasive lesions in comparison with MIA. Type II and type III of the relationship between blood vessels and pure GGNs suggested higher possibility of malignancy than type I. (2017) Can we differentiate minimally invasive adenocarcinoma and non-invasive neoplasms based on high-resolution computed tomography features of pure ground glass nodules? PLoS ONE 12(7): e0180502. https://doi.org/10.

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Section: Discussionmentioning

confidence: 99%

Pure ground-glass opacity on chest computed tomography: predictive factors for invasive adenocarcinoma

et al. 2016

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“…The MIP-rendered five-line sign has smooth lines and clear gaps and can, therefore, be used as the referencing object for other planar structures in the lung. Certain pulmonary pathological features, such as the pleural tail sign [ 14 – 16 ], represented a form of thickened septa [ 15 ]; the five-line sign revealed by MIP reconstruction suggested that it was a relatively smooth and regular plane, and it is difficult to determine using multiplanar or thin-section reconstruction. As we observed that most nodules with the pleural tail sign had an unclear or absent five-line sign, we speculated that the plane was rough and irregular; only a small number of nodules with the tail sign showed a clear five-line sign by MIP rebuilding, but these lines were thicker and denser than those of normal interlobular fissures.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the rebuilding effects of different computed tomography scanners and reconstructive settings for the five-line sign in normal interlobular fissures

Qun

Zhan

et al. 2017

Eur Radiol Exp

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BackgroundBased on the images generated from two multi-slice computed tomography (CT) scanners, we intended to compare the five-line sign of normal interlobular fissures produced on axial or oblique maximum intensity projection (MIP) reconstructions using different algorithms.MethodsTwo groups of 50 subjects underwent either 16-slice or 256-slice spiral unenhanced chest CT. None of them in either group displayed any abnormality. For each case, maximum intensity projection (MIP) data were used to calculate the axial or oblique projection using four algorithms: standard axial, standard oblique, high-resolution axial, and high-resolution oblique algorithm. The results were then used to reconstruct images of six locations of the lung. The clarity of the five-line sign of the reconstructed MIPs for the interlobular fissures was determined and graded as 1 (unclear), 2 (barely clear), or 3 (clear). Comparisons of the rate and the degree of clarity were performed using non-parametric tests.ResultsData from both the 16-slice and 256-slice CT revealed that the standard oblique algorithm was the best among the four methods for presenting clear images of the five-line sign (p < 0.001), whereas the high-resolution axial algorithm was the worst. In addition, the two CT units exhibited no significant differences in the clarity of the five-line sign (p = 0.273).ConclusionsThe standard oblique algorithm was the best approach to reveal the five-line sign of normal lung fissures. Both 16-slice and 256-slice CT were effective for reconstructing the sign.

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“…Thus, 5-line signs could be used to differentiate accessory fissures and fissure hypoplasia from interstitial fibrosis and septal thickening, which are irregular and uneven in the lung. [8][9][10] …”

Section: Discussionmentioning

confidence: 99%

Conditions and Mechanism for the Appearance of Interlobar Fissures as 5-Line Signs in Axial Maximum Intensity Projection Images

Yu¹,

Qun

et al. 2014

Journal of Computer Assisted Tomography

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"Tail" signs associated with pulmonary lesions: critical reappraisal

Cited by 23 publications

References 0 publications

Pure ground-glass opacity on chest computed tomography: predictive factors for invasive adenocarcinoma

Pure ground-glass opacity on chest computed tomography: predictive factors for invasive adenocarcinoma

Comparison of the rebuilding effects of different computed tomography scanners and reconstructive settings for the five-line sign in normal interlobular fissures

Conditions and Mechanism for the Appearance of Interlobar Fissures as 5-Line Signs in Axial Maximum Intensity Projection Images

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