Comparative genomic hybridisation as a supportive tool in diagnostic pathology

Area of Science:

• Oncology
• Genetics
• Pathology

Background:

• Differentiating between metastatic disease and second primary tumours is critical for patient treatment but often challenging using conventional methods.
• Traditional diagnostic tools like morphology and immunohistochemistry may lack the specificity needed for complex cases of multiple tumour localisations.
• Molecular techniques are increasingly vital as ancillary tools in surgical pathology for accurate tumour characterisation.

Observation:

• Comparative Genomic Hybridisation (CGH) was employed to analyse chromosomal aberrations in seven patients with multiple tumour sites.
• CGH allows for the genome-wide assessment of amplifications, gains, and losses within tumour cells.
• Patterns of chromosomal aberrations were compared across different tumour localisations to identify distinct genetic profiles.

Findings:

• In all seven cases, CGH successfully differentiated between metastasis and second primary tumours.
• The technique accurately identified the primary tumour origin in cases involving metastases and multiple primary tumours.
• Specific patterns of gains and losses observed via CGH provided conclusive diagnostic evidence.

Implications:

• CGH demonstrates significant diagnostic value in challenging cases of patients with multiple tumours.
• This molecular approach can guide critical therapeutic strategies by clarifying tumour origin and spread.
• Integrating CGH into pathological workflows can improve diagnostic accuracy and patient management in complex oncology cases.