Figure 4.

CT imaging of primary lung extranodal NK/T-cell lymphoma (ENKTL). (A) Lung window CT scan shows an irregular mass in the right hilum, with evidence of airway compression and partial obstruction of the bronchus. The mass is lobulated with spiculated borders, consistent with an aggressive lesion, and appears to be close in proximity to the pulmonary vasculature. (B) Mediastinal window CT scan demonstrates enlargement of several mediastinal lymph nodes, suggesting possible lymphatic involvement. The mass appears to be invading adjacent mediastinal structures, raising concerns about local invasion into the surrounding tissues and vascular compression. CT, computed tomography; ENKTL, extranodal NK/T-cell lymphoma; NK, natural killer.