Pulmonary carcinoid tumor UMLS:C0280089 Pulmonary carcinoid tumour Lung carcinoid tumor SNOMEDCT_US:254627002 Lung carcinoid tumour A malignant neuroendocrine tumor of the lung. According to histopathologic criteria (WHO 2004), carcinoids are divided into four groups i.e. typical and atypical carcinoids, large cell neuroendocrine carcinoma and small cell lung carcinoma. Carcinoid tumor