• Unknown.

• Carcinoids exhibit Kulchitsky cell differentation

• Salivary gland type neoplasms presumably arise from bronchial glands

• Extremely uncommon.

• More frequent in young patients <40 years
.

• Unrelated to cigarette smoking

• Cough with hemoptysis

• Systemic symptoms of distal pneumonia including fever, malaise, sweats etc

• Low grade neoplasms may metastasize to adjacent nodes

• For more information on prognosis and treatment, consult the NCI web site.
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• Polypoid tan mass protruding into the lumen of a major bronchus

• Distal obstructive pneumonia may be profound with dilated mucous filled airways and consolidated firm parenchyma

• >90% of these neoplasms are carcinoid tumors

• Remainder include low grade salivary gland malignancies such as adenoid cystic carcinoma and mucoepidermoid carcinoma

• Microscopic findings are identical to same neoplasms at other body sites

• Cotran RS, Kumar V, Robbins SL: Robbins Pathologic Basis of Disease. 5th edition. Philadelphia, W.B. Saunders, 1994, pp. 726-727.

• Current literature from PubMed at National Library of Medicine