Carcinoma ex pleomorphic adenoma of the trachea: A case report

Figure 1 Computed tomography scan showing an inhomogeneous, broad-based lesion arising from the tracheal wall on the right side. Calcification can be seen in the anterior part of the tumor.

Figure 2 Bronchoscopic examination showing a subglottic neoplasm causing up to 90% luminal stenosis of the trachea.

Figure 3 Microscopic examination of the resected specimen showing a biphasic composition with benign histological characteristics suggestive of pleomorphic adenoma and malignant changes in the epithelial components (hematoxylin and eosin).

Figure 4 Microscopic examination of the resected specimen showing solid nests in a cribriform pattern associated with hyalinized stroma, which is incorporated into the tumor islands and sheets (hematoxylin and eosin).