Primary endo-bronchial muco-epidermoid carcinoma in a 22-year-old female: A case report

•MEC are commonly of salivary gland origin, which in rare circumstances can involve respiratory tree as primary site.•Lung MEC are classified on the basis of their grade which is also predictive of their behaviour.•We report a case of a patient, who presented with lower respiratory symptoms and was diagnosed with low-grade MEC of the lung.•Surgery is the mainstay of treatment in cases of localized MEC.•Adjuvant radiotherapy may be required in some cases; however there is no role of adjuvant systemic therapy for resected MEC.