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Updated: Aug 7, 2026

Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH
Published on: August 19, 2014
Chromosome aberrations in solid tumors have a stochastic nature
Mauro A A Castro1, Tor G H Onsten, José C F Moreira
1Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-anexo, Porto Alegre 90035-003, Brazil. mauro@ufrgs.br <mauro@ufrgs.br>
Chromosome aberrations in cancer are neither fully random nor deterministic. Their spread, quantified using Shannon information, correlates with tumor type and survival, suggesting recurrence indicates better prognosis.
Area of Science:
- Genetics
- Cancer Biology
- Information Theory
Background:
- The origin of chromosome aberrations (changes in chromosome number or structure) is debated: are they random or deterministic?
- Quantifying the randomness of these aberrations is crucial for understanding cancer development.
Purpose of the Study:
- To evaluate the degree of randomness in chromosome aberrations within and between different tumor types.
- To correlate aberration patterns with tumor malignancy and patient survival.
Main Methods:
- Utilized Shannon information functions to quantify disorder in chromosome aberrations.
- Analyzed karyotype data from 79 solid tumor types from the Mitelman Database.
- Correlated aberration diversity with Kaplan-Meier survival data.
Main Results:
- Aberration spread is tumor-specific, with higher diversity in tumors exhibiting poorer survival.
- Tumor types with preferential karyotype variants show better survival, indicating recurrence is a good prognostic factor.
- Global spread of abnormalities suggests a stochastic, rather than deterministic, origin of chromosome aberrations.
Conclusions:
- Chromosome aberration generation is not entirely deterministic or random but falls within a spectrum.
- Quantifying aberration spread can help differentiate between cancer development models.
- Tumor malignancy correlates with karyotypic diversity both within and between tumor types.
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