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Normal radiological lymph node appearance in the thorax.

Abstract：

:Modern treatment of esophageal cancer is multimodal and highly dependent on a detailed diagnostic assessment of clinical stage, which includes nodal stage. Clinical appraisal of nodal stage is highly dependent on knowledge of normal radiological appearance, information of which is scarce. We aimed to describe lymph node appearance on computed tomography (CT) investigations in a randomly selected cohort of healthy subjects. In a sample of the Swedish Cardiopulmonary bioimage study, which investigates a sample of the Swedish population aged 50-64 years, the CT scans of 426 subjects were studied in detail concerning intrathoracic node stations relevant in clinical staging of esophageal cancer. With stratification for sex, the short axis of visible lymph nodes was measured and the distribution of lymph node sizes was calculated as well as proportion of patients with visible nodes above 5 and 10 millimeters for each station. Probability of having any lymph node station above 5 and 10 millimeters was calculated with a logistic regression model adjusted for age and sex. In the 214 men (aged: 57.3 ± 4.1 years) and 212 women (aged: 57.8 ± 4.4 years) included in this study, a total of 309 (72.5%) had a lymph node with a short axis of 5 mm or above was seen in at least one of the node stations investigated. When using 10 mm as a cutoff, nodes were visible in 29 (6.81%) of the subjects. Men had higher odds of having any lymph node with short axis 5 mm or above (OR 3.03 95% CI 1.89-4.85, P < 0.001) as well as 10 mm or above (OR 2.31 95% CI 1.02-5.23, P = 0.044) compared to women. Higher age was not associated with propensity for lymph nodes above 5 or 10 millimeters in this sample. We conclude that, in a randomly selected cohort of patients between 50 and 64 years, almost 10% of the men and 4% of the women had lymph nodes above 10 millimeters, most frequently in the subcarinal station (station 107). More than half of the patients had nodes above 5 millimeters on CT and men were much more prone to have this finding. The probability of finding lymph nodes in specific stations relevant of esophageal cancer is now described.

journal_name

Dis Esophagus

journal_title

Diseases of the esophagus : official journal of the International Society for Diseases of the Esophagus

authors

Hansen T,Nilsson M,Lindholm D,Sundström J,Hedberg J

doi

10.1093/dote/doy120

subject

Has Abstract

pub_date

2019-12-13 00:00:00

pages

1-6

issue

eissn

1120-8694

issn

1442-2050

pii

5250779

journal_volume

pub_type

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Normal radiological lymph node appearance in the thorax.