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Clin Lung Cancer. 2018 Jan;19(1):e47-e51. doi: 10.1016/j.cllc.2017.06.020. Epub 2017 Jul 8.

Presence of Even a Small Ground-Glass Component in Lung Adenocarcinoma Predicts Better Survival.

Author information

1
Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA. Electronic address: berry037@stanford.edu.
2
Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA.
3
Department of Pathology, Stanford University School of Medicine, Stanford, CA.
4
Department of Radiology, Stanford University School of Medicine, Stanford, CA.

Abstract

BACKGROUND:

While lepidic-predominant lung adenocarcinomas are known to have better outcomes than similarly sized solid tumors, the impact of smaller noninvasive foci within predominantly solid tumors is less clearly characterized. We tested the hypothesis that lung adenocarcinomas with even a small ground-glass opacity (GGO) component have a better prognosis than otherwise similar pure solid (PS) adenocarcinomas.

PATIENTS AND METHODS:

The maximum total and solid-component diameters were determined by preoperative computed tomography in patients who underwent lobar or sublobar resection of clinical N0 adenocarcinomas without induction therapy between May 2003 and August 2013. Survival between patients with PS tumors (0% GGO) or tumors with a minor ground-glass (MGG) component (1%-25% GGO) was compared by Kaplan-Meier and Cox analyses.

RESULTS:

A total of 123 patients met the inclusion criteria, comprising 54 PS (44%) and 69 MGG (56%) whose mean ground-glass component was 18 ± 7%. The solid component tumor diameter was not significantly different between the groups (2.3 ± 1.2 cm vs. 2.5 ± 1.3 cm, P = .2). Upstaging to pN1-2 was more common for the PS group (13% [7/54] vs. 3% [2/69], P = .04), but the distribution of pathologic stage was not significantly different between the groups (PS 76% stage I [41/54] vs. MGG 80% stage I [55/69], P = .1). Having a MGG component was associated with markedly better survival in both univariate analysis (MGG 5-year overall survival 86.7% vs. PS 64.5%, P = .001) and multivariable survival analysis (hazard ratio, 0.30, P = .01).

CONCLUSION:

Patients with resected cN0 lung adenocarcinoma who have even a small GGO component have markedly better survival than patients with PS tumors, which may have implications for both treatment and surveillance strategies.

KEYWORDS:

Ground-glass opacity; Lobectomy; Non–small-cell lung cancer; Outcomes; Sublobar resection

PMID:
28743420
DOI:
10.1016/j.cllc.2017.06.020
[Indexed for MEDLINE]

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