Pulmonary carcinoid (PC) is a rare low-grade malignant neuroendocrine tumor. Unlike other neuroendocrine tumors of the digestive tract, PC seldom causes hormone-related neuroendocrine symptoms, and the diagnosis mainly depends on the biopsy of the lesion. Besides, the immunohistochemical staining technique is an important supplement and a grading standard for pathological diagnosis. Surgery is the first choice for the treatment of early PC. However, the therapy of advanced PC which is the main problem perplexing most of clinicians is controversial and still facing severe challenges. Therefore, we will discuss the current progress of the diagnosis and therapy of advanced PC.
