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Related Experiment Video

Updated: Mar 27, 2026

Integration of Wet and Dry Bench Processes Optimizes Targeted Next-generation Sequencing of Low-quality and Low-quantity Tumor Biopsies

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Published on: April 11, 2016

Germline BAP1 mutations misreported as somatic based on tumor-only testing.

Mohamed H Abdel-Rahman^1,2,3, Karan Rai⁴, Robert Pilarski⁴

¹Department of Ophthalmology and Visual Science, The Ohio State University, Columbus, OH, USA. mohamed.abdel-rahman@osumc.edu.

Familial Cancer

|January 11, 2016

Summary

This summary is machine-generated.

Germline BAP1 mutations can be misidentified as somatic mutations, especially in hereditary cancer cases. Sequencing both germline and tumor DNA is crucial for accurate mutation assessment and genetic counseling.

Keywords:

BAP1 Familial cancer Hereditary cancer predisposition Uveal melanoma

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Last Updated: Mar 27, 2026

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Next Generation Sequencing for the Detection of Actionable Mutations in Solid and Liquid Tumors

Next Generation Sequencing for the Detection of Actionable Mutations in Solid and Liquid Tumors

Published on: September 20, 2016

Area of Science:

Genetics
Oncology
Molecular Biology

Background:

Germline mutations in the BAP1 gene are associated with hereditary cancer predisposition.
Tumor-only genomic testing can sometimes misclassify germline mutations as somatic.
Accurate distinction between somatic and germline mutations is critical for patient management and genetic counseling.

Purpose of the Study:

To highlight the importance of distinguishing germline from somatic mutations in BAP1.
To emphasize the need for matched germline and tumor DNA sequencing.
To address the ethical considerations of tumor-only genomic testing in hereditary cancer predisposition.

Main Methods:

Case series presentation of three unrelated patients with BAP1 germline mutations.
Analysis of tumor and germline DNA sequencing data.
Review of personal and family cancer histories.

Main Results:

Three patients with BAP1 germline mutations were initially misreported as having somatic mutations.
One patient with invasive breast cancer showed loss of the mutant allele in tumor tissue, suggesting the germline mutation did not drive this specific cancer.
Strong family histories of cancer were noted in all affected individuals.

Conclusions:

Matched germline and tumor DNA sequencing is essential for accurate somatic versus germline mutation status determination.
Tumor-only testing may reveal germline mutations, necessitating consideration of hereditary cancer predisposition.
Ethical issues, including informed consent and genetic counseling, must be addressed in tumor-only genomic testing scenarios.