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Updated: Apr 21, 2026

MicroRNA Based Liquid Biopsy: The Experience of the Plasma miRNA Signature Classifier MSC for Lung Cancer Screening
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Microsatellite alteration in multiple primary lung cancer.

Cheng Shen1, Xin Wang1, Long Tian1

  • 1Department of Thoracic Surgery, West-China Hospital, Sichuan University, Chengdu 610041, China.

Journal of Thoracic Disease
|November 4, 2014
PubMed
Summary

Distinguishing multiple primary lung cancers from metastasis is crucial for patient outcomes. Microsatellite instability (MSI) and loss of heterozygosity (LOH) offer valuable molecular insights for accurate diagnosis.

Keywords:
Microsatellite instability (MSI)loss of heterozygosity (LOH)multiple primary lung cancer

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Patients with lung cancer have a higher risk of developing secondary lung tumors.
  • Differentiating independent primary lung cancers from metastatic disease is critical for prognosis and treatment.
  • Microsatellite instability (MSI) and loss of heterozygosity (LOH) are key indicators of genetic instability in cancer development.

Purpose of the Study:

  • To review the literature on the significance of MSI and LOH in multiple primary lung cancers.
  • To introduce a novel diagnostic method for distinguishing multiple primary lung cancers from metastatic disease.

Main Methods:

  • Literature review of studies investigating MSI and LOH in multiple primary lung cancers.
  • Development of a new method analyzing allelic variations at polymorphic microsatellite markers without requiring normal tissue samples.

Main Results:

  • MSI and LOH play a significant role in both early and late stages of multiple primary lung cancers.
  • The proposed method utilizes minimal tumor samples and allelic variations for diagnosis.

Conclusions:

  • MSI and LOH are important molecular markers in the context of multiple primary lung cancers.
  • The novel method offers a promising approach to complement clinical criteria for differential diagnosis, reducing the need for normal tissue collection.