Mucoepidermoid Carcinoma of the Lung: A Case Report and Literature Review
Figure 2
(a) Bronchoscopic image showing a smooth, well-circumscribed endobronchial tumor (arrow) at the orifice of the right upper lobe bronchus. (b) Low power (20x) microscopic image showing a polypoid endobronchial mass extending into the bronchial lumen (arrow) and superficially invading the submucosa. (c) Tumor is comprised of glands, tubules, and cysts containing mucin (arrow) separated by a fibrous stroma (100x). (d) Higher power (400x) microscopic image showing a mixture of mucin-secreting cells (arrow) admixed with sheets of squamoid and intermediate cells (arrowhead) intimately admixed with the glandular component. The cells lack significant mitotic activity, nuclear pleomorphism, and cellular necrosis characteristic of a low-grade mucoepidermoid carcinoma.
