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| ==Pulmonary carcinoid tumourlet== | | ==Pulmonary carcinoid tumourlet== |
| *[[AKA]] ''carcinoid tumourlet''. | | *[[AKA]] ''carcinoid tumourlet''. |
| ===General===
| | {{Main|Pulmonary carcinoid tumourlet}} |
| *Neuroendocrine cell proliferation.<ref>{{Cite journal | last1 = Bennett | first1 = GL. | last2 = Chew | first2 = FS. | title = Pulmonary carcinoid tumorlets. | journal = AJR Am J Roentgenol | volume = 162 | issue = 3 | pages = 568 | month = Mar | year = 1994 | doi = | PMID = 8109497 | URL = http://www.ajronline.org/content/162/3/568.full.pdf }}</ref>
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| **Essentially a small [[typical carcinoid lung tumour|typical carcinoid]].
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| ===Microscopic===
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| Features:
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| *Nests of cells - classic pattern.
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| **Salt and pepper chromatin - '''key feature'''.
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| *Size criterion: <5 mm.<ref name=pct_ucsf>URL: [http://pathhsw5m54.ucsf.edu/case7/image75.html http://pathhsw5m54.ucsf.edu/case7/image75.html]. Accessed on: 23 January 2012.</ref><ref name=pmid23205296>{{Cite journal | last1 = He | first1 = P. | last2 = Gu | first2 = X. | last3 = Wu | first3 = Q. | last4 = Lin | first4 = Y. | last5 = Gu | first5 = Y. | last6 = He | first6 = J. | title = Pulmonary carcinoid tumorlet without underlying lung disease: analysis of its relationship to fibrosis. | journal = J Thorac Dis | volume = 4 | issue = 6 | pages = 655-8 | month = Dec | year = 2012 | doi = 10.3978/j.issn.2072-1439.2012.06.11 | PMID = 23205296 }}</ref>
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| DDx:
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| *[[Typical carcinoid lung tumour]].
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| ====Images====
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| *[http://pathhsw5m54.ucsf.edu/case7/image75.html Tumourlets - several images (ucsf.edu)].
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| ===Sign out===
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| <pre>
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| A. Lymph Node, Station 4R, Lymphadenectomy:
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| - Lymph node, NEGATIVE for malignancy.
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| B. Lymph Node, Station 11R, Lymphadenectomy:
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| - Lymph node, NEGATIVE for malignancy.
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| C. Lung, Right Middle Lobe, Lobectomy:
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| - Typical carcinoid tumour (13 mm maximal dimension).
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| - Carcinoid tumourlet (3 mm maximal dimension).
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| - Margins clear of tumour.
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| - Please see tumour summary.
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| </pre>
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| ==Typical carcinoid lung tumour== | | ==Typical carcinoid lung tumour== |