mediastinal mass
An abnormal tissue growth within the mediastinum that may represent primary lung cancer, metastatic disease, or other pathology.
Full Definition
A mediastinal mass refers to any abnormal tissue proliferation located within the mediastinum, the central compartment of the thoracic cavity. In thoracic oncology, mediastinal masses may represent primary lung cancers with mediastinal extension, metastatic lymphadenopathy, primary mediastinal tumors such as thymomas or lymphomas, or metastases from extrathoracic primaries. The anatomical location within specific mediastinal compartments (anterior, middle, or posterior) helps narrow the differential diagnosis. Evaluation typically involves cross-sectional imaging, and tissue sampling may require specialized approaches such as mediastinoscopy, endobronchial ultrasound, or CT-guided biopsy depending on the location and suspected pathology.
Usage
Usage note: Distinguish from mediastinal lymphadenopathy, which refers specifically to enlarged lymph nodes.
In Context
- "The anterior mediastinal mass measured 8 cm and was concerning for thymoma versus lymphoma." — Radiology report
- "Biopsy of the mediastinal mass revealed metastatic squamous cell carcinoma." — Pathology report