CT-guided biopsy of peripheral typical carcinoid tumor The definitive diagnosis is rendered by a microscopic examination, after excision. Typical carcinoids have cells with stippled chromatin and a moderate quantity of cytoplasm. They typically have few mitoses and lack necrosis. By definition, they are greater than 4 mm in largest dimension; smaller lesions are referred to as pulmonary carcinoid tumourlets. The differential diagnosis of<unk>  includes:<unk> , pulmonary carcinoid tumourlet and lung adenocarcinoma. Image: Lung carcinoid - very high mag. Very high magnification File:Typical carcinoid tumor of the lung, prominent rosettes.With prominent rosettes
Typical pulmonary carcinoid tumour
Atypical pulmonary carcinoid tumour
Salivary gland–like carcinoma of the lung
Poorly differentiated thyroid cancer
Large cell neuroendocrine carcinoma of the lung
Fibroblastic and myofibroblastic tumors
Anaplastic thyroid cancer
Epithelial-myoepithelial carcinoma of the lung