Atypical pulmonary carcinoid tumour is a subtype of
pulmonary carcinoid tumor.
It is an uncommon low-grade malignant lung mass that is most often in the central airways of the lung. It is also known as "atypical lung carcinoid tumour", " atypical lung carcinoid" or "moderately differentiated neuroendocrine carcinoma".
It is a more aggressive than typical carcinoid tumors: nodal metastases in 70% vs. 5%. The 5 year survival is 49-69%.
Atypical carcinoid tumors have increased mitotic activity (2-10 per 10
HPF), nuclear pleomorphism or foci of necrosis.
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Morphological differential diagnosis
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Typical pulmonary carcinoid tumor
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.
Signs and symptoms
Lung carcinoids typically present with a coug ...
** Typical pulmonary carcinoid lacks comedo-like necrosis, and has < 0.2 mitotic figures/HPF.
References
Lung disorders
Tumor
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