A member asked:

What causes the rusty sputum in pneumonia?

A doctor has provided 1 answer
Dr. Lokesh Guglani answered

Specializes in Pediatric Pulmonology

Entry of red cells: The rusty sputum tends to occur in the stage of red hepatization of pneumonia when red blood cells leak into the alveolar spaces in the lung. When coughed out, the sputum at this early stage of infection can have a rusty appearance.

Answered 7/21/2019

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