Genetics, Cancer & Asbestos Cases in Louisiana

Cancer medicine has evolved. Genetics now plays an increasing role in how many cancers are diagnosed and studied.

Defense strategies in asbestos and toxic exposure cases have evolved too.

At Landry & Swarr, our attorneys have successfully defeated genetics-based defenses in multiple Louisiana courtrooms while also securing a landmark Louisiana Court of Appeal ruling protecting asbestos victims’ rights.

In May v. Cooper/T. Smith Stevedoring Co., the Fourth Circuit sided with Landry & Swarr in a pivotal decision confirming that insurers cannot use restrictive policy language to deny coverage for long-latency asbestos diseases like mesothelioma.

More recently, Louisiana courts have again ruled in cases handled by our firm that:

defendants cannot force invasive genetic testing based on speculation, and
genetics witnesses cannot stretch beyond their medical qualifications to shift blame away from asbestos exposure.

Together, these rulings reflect a clear trend: Louisiana courts are closely scrutinizing genetics-based defenses when they are used to distract from established exposure evidence.

With decades of trial experience in mesothelioma, lung cancer, and toxic exposure litigation, Landry & Swarr understands both the medical science and the evolving defense playbook. We know when genetics is being used appropriately — and when it is being stretched beyond what the law and the evidence support.

Why Genetics Comes Up in Asbestos and Lung Cancer Cases

Genetics can be relevant in medicine. But in the courtroom, genetics can sometimes be used as a distraction.

Defendants may argue:

“This cancer runs in the family.”
“This mutation explains the diagnosis.”
“If genetics played a role, asbestos didn’t.”

That framing is often incomplete.

A genetic marker does not automatically replace exposure evidence. Many cancers involve complex interactions between environment and biology. Louisiana courts require that causation opinions be grounded in qualified testimony and reliable medical support—not hypotheticals.

General Causation vs. Specific Causation

A key issue in genetics-based defenses is the difference between general causation and specific causation:

General causation: Can something cause a disease in humans?
Specific causation: Did it cause this individual’s disease?

That distinction matters because genetics testimony is often offered in broad terms and then used to imply a specific conclusion about the plaintiff.

Landry & Swarr is prepared to challenge that leap when it is not supported by qualified medical evidence.

Why This Matters for Louisiana Families

Louisiana has a long industrial history. Many exposures occurred decades ago—at shipyards, refineries, chemical plants, power facilities, and industrial job sites statewide.

When a diagnosis appears years later, defendants often look for alternative explanations to reduce accountability. Genetics has become one of the newest approaches.

If you or a loved one is facing mesothelioma, asbestos-related lung cancer, or another disease tied to toxic exposure, it is important to work with attorneys who understand how modern cancer medicine intersects with modern defense strategies.

Talk With Landry & Swarr About Your Case Today

Every case depends on the facts—work history, exposure pathways, medical records, and the science.

If genetics is being raised as an issue in your case, we can help you understand what it means, what it does not mean, and how Louisiana courts handle these disputes.

Call (504) 299-1214 or use our online form to request a consultation.