小細胞肺癌比較不常見，約佔肺癌的 13%⁴¹，其生長速度一般比非小細胞肺癌快。與非小細胞肺癌相比，通常小細胞肺癌對化療的反應較佳⁸。

8. Lung Cancer 101. Types and Staging of Lung Cancer. Available at: https://www.lungcancer.org/find_information/publications/163-lung_cancer_101/268-types_and_staging. Accessed: 24 Nov 2021.

41. American Cancer Society. Key Statistics for Small Cell Lung Cancer. Available at: https://www.cancer.org/cancer/small-cell-lung-cancer/about/key-statistics.html. Accessed: 24 Nov 2021.