Atypical pulmonary carcinoid tumour
Appearance
Atypical pulmonary carcinoid tumour | |
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Atypical pulmonary carcinoid. H&E stain. | |
Specialty | Oncology |
![]() | This article needs more reliable medical references for verification or relies too heavily on primary sources. (June 2021) | ![]() |
Atypical pulmonary carcinoid tumour is a subtype of pulmonary carcinoid tumor.[1] 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.
Morphological differential diagnosis
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Atypical_pulmonary_carcinoid_tumour%2C_low_mag.jpg/220px-Atypical_pulmonary_carcinoid_tumour%2C_low_mag.jpg)
- Typical pulmonary carcinoid tumor
- Typical pulmonary carcinoid lacks comedo-like necrosis, and has < 0.2 mitotic figures/HPF.
References
[edit]- ^ Limaiem, Faten; Tariq, Muhammad Ali; Wallen, Jason M. (2021). "Lung Carcinoid Tumors". StatPearls. StatPearls Publishing. PMID 30725765. Retrieved 26 June 2021.