left main bronchus C3410 Malignant neoplasm of upper lobe, unsp bronchus or lung C3411 Malignant neoplasm of upper lobe, right bronchus or lung 2 AHD.com C3412 Malignant neoplasm of upper lobe, left bronchus or lung C342 Malignant neoplasm of middle lobe, bronchus or lung C3431 Malignant...