Adenocarcinoma of the lung pathophysiology

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Shanshan Cen, M.D. [2]

Overview

Genes involved in the pathogenesis of adenocarcinoma of the lung include EGFR, HER2, KRAS, ALK, and BRAF.[1] The exact pathogenesis of [disease name] is not fully understood.

OR

It is thought that [disease name] is the result of / is mediated by / is produced by / is caused by either [hypothesis 1], [hypothesis 2], or [hypothesis 3].

OR

[Pathogen name] is usually transmitted via the [transmission route] route to the human host.

OR

Following transmission/ingestion, the [pathogen] uses the [entry site] to invade the [cell name] cell.

OR


[Disease or malignancy name] arises from [cell name]s, which are [cell type] cells that are normally involved in [function of cells].

OR

The progression to [disease name] usually involves the [molecular pathway].

OR

The pathophysiology of [disease/malignancy] depends on the histological subtype.

Pathogenesis

  • Adenocarcinoma is the most common type of lung cancer found in non-smokers and is usually seen as a peripheral lesion in the lungs, as compared to centrally located tumors such as small cell lung cancer and squamous cell lung cancer.[2][3]

Genetics

Gross Pathology

  • Peripheral lesions
  • May be multifocal

On gross pathology, peripheral multifocal lesions is the characteristic finding of adenocarcinoma of the lung.[7] On microscopic histopathological analysis, nuclear atypia, eccentrically placed nuclei, abundant cytoplasm, and conspicuous nucleoli are characteristic findings of adenocarcinoma of the lung.

Genetics

  • [Disease name] is transmitted in [mode of genetic transmission] pattern.
  • Genes involved in the pathogenesis of [disease name] include [gene1], [gene2], and [gene3].
  • The development of [disease name] is the result of multiple genetic mutations.

Associated Conditions

Gross Pathology

  • On gross pathology, [feature1], [feature2], and [feature3] are characteristic findings of [disease name].

Microscopic Pathology

  • On microscopic histopathological analysis, [feature1], [feature2], and [feature3] are characteristic findings of [disease name].


Gallery

Microscopic Pathology

  • Nuclear atypia
  • Eccentrically placed nuclei
  • Abundant cytoplasm
  • Conspicuous nucleoli
  • Nuclear pseudoinclusions
  • Lack of intercellular bridges

Subtypes[9]

  • Lepidic predominant
  • Tumor grows long the alveolar wall
  • Acinar predominant
  • Berry-shaped glands, smaller than lung acini
  • Papillary predominant
  • Fibrovascular cores
  • Micropapillary predominant
  • Nipple shaped projections without fibrovascular cores
  • Solid predominant
  • Sheet of cells

Gallery

References

  1. Stewart, Bernard (2014). World cancer report 2014. Lyon, France Geneva, Switzerland: International Agency for Research on Cancer,Distributed by WHO Press, World Health Organization. ISBN 9283204298.
  2. Travis WD, Travis LB, Devesa SS (January 1995). "Lung cancer". Cancer. 75 (1 Suppl): 191–202. doi:10.1002/1097-0142(19950101)75:1+<191::AID-CNCR2820751307>3.0.CO;2-Y. PMID 8000996.
  3. Mitchell, Richard Sheppard; Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson. "Chapter 13, box on morphology of adenocarcinoma". Robbins Basic Pathology (8th ed.). Philadelphia: Saunders. ISBN 1-4160-2973-7.
  4. Stewart, Bernard (2014). World cancer report 2014. Lyon, France Geneva, Switzerland: International Agency for Research on Cancer,Distributed by WHO Press, World Health Organization. ISBN 9283204298.
  5. Soda M, Choi YL, Enomoto M, Takada S, Yamashita Y, Ishikawa S; et al. (2007). "Identification of the transforming EML4-ALK fusion gene in non-small-cell lung cancer". Nature. 448 (7153): 561–6. doi:10.1038/nature05945. PMID 17625570.
  6. Davies KD, Le AT, Theodoro MF, Skokan MC, Aisner DL, Berge EM; et al. (2012). "Identifying and targeting ROS1 gene fusions in non-small cell lung cancer". Clin Cancer Res. 18 (17): 4570–9. doi:10.1158/1078-0432.CCR-12-0550. PMC 3703205. PMID 22919003.
  7. Adenocarcinoma of the lung. Librepathology 2015. http://librepathology.org/wiki/index.php/File:Adenocarcinoma_%283950819000%29.jpg
  8. Adenocarcinoma of the lung. Librepathology 2015. http://librepathology.org/wiki/index.php/File:Adenocarcinoma_%283950819000%29.jpg
  9. Adenocarcinoma of the lung. Librepathology 2015. http://librepathology.org/wiki/index.php/Adenocarcinoma_of_the_lung#Microscopic Accessed on December 20, 2015
  10. Acinar adenocarcinoma. Librepathology 2015. http://librepathology.org/wiki/index.php/File:Mucinous_adenocarcinoma_of_the_lung_--_high_mag.jpg
  11. Mucinous adenocarcinoma. Librepathology 2015. http://librepathology.org/wiki/index.php/File:Acinar_pattern_adenocarcinoma_of_lung_--_intermed_mag.jpg


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