Primary mucoepidermoid carcinoma of the lung.

Mucoepidermoid carcinoma (MEC) of the lung is a rare endobronchial tumor accounting for up to 0.2% of primary lung cancer. We report a patient with MEC who presented with cough, hemoptysis, and localized findings on chest examination. This case emphasizes the importance of obtaining adequate biopsy to establish the correct diagnosis. In addition, it highlights that MEC of the lung usually presents in the low-grade form, carrying a favorable prognosis.