Typical carcinoid lung tumour

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Typical carcinoid lung tumour
Diagnosis in short

Lung carcinoid. H&E stain.
LM DDx atypical carcinoid lung tumour, pulmonary carcinoid tumourlet, lung adenocarcinoma
IHC Ki-67 ~2% (0-7%)
Site lung - see lung tumours

Symptoms +/-cough, +/-hemoptysis
Prevalence not common
Prognosis benign
Clin. DDx other lung tumours
Treatment excision to exclude other types of lung tumours & treat symptoms

Typical carcinoid lung tumour, also lung carcinoid and carcinoid tumour of the lung, is a benign lung tumour, that is excised to exclude malignancy.

General

  • Approximately 80% of lung carcinoids.[1]

Presentation:[2]

  • Cough.
  • Hemoptysis.

Gross

  • Well-circumscribed, solid.
  • Location - central airways (85%), remainder peripheral.[3]

Microscopic

Features:

  • Nests of cells.
    • Stippled chromatin.
    • Moderate cytoplasm.
  • No necrosis.
  • Low mitotic rate.
  • Size criterion: >= 5 mm.[4][5]

DDx:

Images

IHC

  • Ki-67 ~2% (range 0-7%).[7]

Note:

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A. Lymph Node, Station 2L, Lymphadenectomy:
- Lymph node, NEGATIVE for malignancy.

B. Lymph Node, Station 4L, Lymphadenectomy:
- Lymph node, NEGATIVE for malignancy.

C. Lymph Node, Station 11L, Lymphadenectomy:
- Lymph node, NEGATIVE for malignancy.

D. Lung, Left Upper Lobe, Lobectomy:
- Typical carcinoid tumour (12 mm maximal dimension).
- Carcinoid tumourlet (2 mm maximal dimension).
- Margins clear of tumour.
- Please see tumour summary.

See also

References

  1. Naalsund, A.; Rostad, H.; Strøm, EH.; Lund, MB.; Strand, TE. (Apr 2011). "Carcinoid lung tumors--incidence, treatment and outcomes: a population-based study.". Eur J Cardiothorac Surg 39 (4): 565-9. doi:10.1016/j.ejcts.2010.08.036. PMID 20888248.
  2. Gungor, S.; Damadoglu, E.; Aybatli, A.; Yilmaz, A.; Kir, A.; Akkaya, E. (Jul 2006). "Typical pulmonary carcinoid tumors: presentation and outcome of 24 cases.". Med Sci Monit 12 (7): CR315-8. PMID 16810137.
  3. Meisinger, QC.; Klein, JS.; Butnor, KJ.; Gentchos, G.; Leavitt, BJ. (Nov 2011). "CT features of peripheral pulmonary carcinoid tumors.". AJR Am J Roentgenol 197 (5): 1073-80. doi:10.2214/AJR.10.5954. PMID 22021498.
  4. URL: http://pathhsw5m54.ucsf.edu/case7/image75.html. Accessed on: 23 January 2012.
  5. He, P.; Gu, X.; Wu, Q.; Lin, Y.; Gu, Y.; He, J. (Dec 2012). "Pulmonary carcinoid tumorlet without underlying lung disease: analysis of its relationship to fibrosis.". J Thorac Dis 4 (6): 655-8. doi:10.3978/j.issn.2072-1439.2012.06.11. PMID 23205296.
  6. Demirci, I.; Herold, S.; Kopp, A.; Flaßhove, M.; Klosterhalfen, B.; Janßen, H. (2012). "Overdiagnosis of a typical carcinoid tumor as an adenocarcinoma of the lung: a case report and review of the literature.". World J Surg Oncol 10: 19. doi:10.1186/1477-7819-10-19. PMID 22269186.
  7. 7.0 7.1 Liu, SZ.; Staats, PN.; Goicochea, L.; Alexiev, BA.; Shah, N.; Dixon, R.; Burke, AP. (2014). "Automated quantification of Ki-67 proliferative index of excised neuroendocrine tumors of the lung.". Diagn Pathol 9: 174. doi:10.1186/s13000-014-0174-z. PMID 25318848.