Bronchoalveolar Lavage Fluid

This is a single-centre, Phase II, prospective study designed to assess BALF and TA-derived biomarkers in relation to metastatic burden in STS patients. BALF and TA samples will be collected during routine bronchoscopy performed as part of standard care at Toronto General Hospital (TGH). Additionally, tissue samples of lung metastases and adjacent normal lung will be collected and used to correlate the identified biomarkers.