Virtual Bronchoscopy (VB) vs. Endobronchial Ultrasound (EBUS) Guided Mediastinal Sampling

Medical University of Warsaw60 enrolled

Overview

The study has been designed to evaluate the clinical application of the new virtual bronchoscopy (VB) -based system for transbronchial sampling of the mediastinal masses or enlarged lymph nodes. The software uses data from thorax CT scan and enables airway segmentation and reconstruction simultaneously with predefined mediastinal targets. The most suitable sites for transbronchial needle aspiration are displayed on the internal surface of the airways showed in VB mode. The diagnostic yield of the new system-assisted TBNA will be compared to the reference method (EBUS-TBNA). The study group includes patients with mediastinal mass or lymph node enlargement in whom diagnostic bronchoscopy and TBNA can be applied as diagnostic methods. Both, virtual bronchoscopy guided transbronchial needle aspiration (VB-TBNA) and EBUS-TBNA of the mediastinal targets are performed during the same diagnostic bronchoscopy. Cytologic material from VB-TBNA and EBUS-TBNA is evaluated by two independent pathologists blinded to the method used to obtain the sample. Diagnostic yield and adequacy of aspirates obtained with the two methods will be assessed and compared.

Study Type

INTERVENTIONAL

Allocation

Purpose

DIAGNOSTIC

Masking

SINGLE

Enrollment

Conditions

Lung Cancer,Mediastinal Tumors,

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * provided informed consent * mediastinal mass or lymph node enlargement that requires bronchoscopy and transbronchial sampling * quality of the CT scan which allows bronchial tree and mediastinal target segmentation and reconstruction Exclusion Criteria: * Age below 18 years * known contraindications for bronchoscopy and/or mediastinal sampling, e.g. coagulation disorders

Outcomes

Primary Outcomes

Adequacy of cytologic specimens collected by VB-TBNA vs. EBUS-TBNA

Comparison of the quality and adequacy of the cytologic specimens (in terms of lymphocyte percentage, the presence of neoplastic cells and dust-laden macrophages) collected by VB-TBNA vs. EBUS-TBNA in patients with mediastinal mass or mediastinal lymph node enlargement

Time frame: Approximately five days after the procedure, when the results of the cytological examination will be available

Secondary Outcomes

Diagnostic accuracy of VB-TBNA vs. EBUS-TBNA - the number (and percentage) of cytologic specimens containing diagnostic material (neoplastic cells, granulomas)

Comparison of the diagnostic accuracy of VB-TBNA vs. EBUS-TBNA (in terms of number of cytologic specimens containing diagnostic material e.g. neoplastic cells, granulomas) in patients with mediastinal mass or mediastinal lymph node enlargement. Also the number of patients in whom the specific diagnosis could be established by VB-TBNA vs EBUS-TBNA.

Time frame: up to 8 months