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Subcarinal collection following mediastinoscopy: a normal post-procedural CT finding.

V Dialani¹, D Litmanovich, A A Bankier

¹Department of Radiology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA. vdialani@bidmc.harvard.edu

Clinical Radiology

|February 12, 2011

Summary

A subcarinal collection is common after mediastinoscopy, appearing on 90% of CT scans. These collections have distinct features that help differentiate them from lymph nodes.

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Area of Science:

Thoracic imaging
Medical procedures

Background:

Mediastinoscopy is a surgical procedure to examine lymph nodes in the mediastinum.
Post-procedure imaging is often performed to assess complications or findings.

Purpose of the Study:

To determine the frequency of subcarinal collections after mediastinoscopy.
To identify the computed tomography (CT) features of these collections.

Main Methods:

Retrospective review of patients undergoing mediastinoscopy.
Cross-referencing with CT scans performed within 15 days post-procedure.
Consensus assessment by three thoracic radiologists for subcarinal abnormalities and other CT findings.

Main Results:

A subcarinal collection was present in 9 of 10 patients (90%).
Collections were oval, measuring 1.1-3.2 cm, and had lower attenuation than pre-procedure lymph nodes.
Other findings included tracheobronchial wall thickening, paratracheal collections, mediastinal fat stranding, and air.

Conclusions:

Subcarinal collections are a frequent finding post-mediastinoscopy.
Characteristic CT features aid in distinguishing these collections from lymph nodes.