Your patient complains of coughing up "greenish-brown" sputum. This is most consistent with:

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Bronchitis is an inflammation of the bronchial tubes, which can cause the production of thick, greenish-brown sputum. Cancer may cause coughing up blood or a persistent cough, but not necessarily greenish-brown sputum. Seasonal allergies typically result in clear or white sputum, and pulmonary edema can produce pink, frothy sputum.

Your Patient Complains of Coughing Up "Greenish-Brown" Sputum