Lung adenocarcinoma metastasis to paranasal sinus: A case report

Figure 1 Computerized tomography examination showing a mass located in the posterior segment of the right upper lobe of the lung.

Figure 2 Imaging examination. A: Computerized tomography examination showing tumor invasion of the ethmoid sinus; B: Magnetic resonance imaging showing a mass in the ethmoid sinus.

Figure 3 Pathological immunohistochemistry showing adenocarcinoma infiltrates between fibrous connective tissues, indicating lung adenocarcinoma.

Figure 4 Computed tomography images. A: Computed tomography (CT) of lung obtained two years later, showing no recurrence; B: CT of paranasal sinus obtained two years later, showing no recurrence.