typical pulmonary carcinoid tumour typical pulmonary carcinoid tumour typical pulmonary carcinoid tumour is a subtype of pulmonary carcinoid tumour. it is an uncommon low-grade malignant lung mass that is most often in the central airways of the lung. typical pulmonary carcinoid tumourother namestypical lung carcinoid tumour, lung carcinoid, typical lung carcinoidmicrograph of a typical pulmonary carcinoid tumour.specialtyoncology signs and symptoms lung carcinoids typically present with a cough or hemoptysis. findings may closely mimic malignant tumours of the lung, i.e. lung cancer. diagnosis 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 typical pulmonary carcinoid tumour includes: atypical pulmonary carcinoid tumour, pulmonary carcinoid tumourlet and lung adenocarcinoma. very high magnification with prominent rosettes treatment typical carcinoids are usually treated with surgical excision.