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What Is a Pre-Existing Condition Defense in Delaware Personal Injury Cases: What Delaware Injury Victims Need to Know

Quick AnswerDelaware follows the eggshell plaintiff rule, sometimes called the thin skull rule. A defendant takes the plaintiff as they find them. If a pre-existing condition makes the plaintiff more susceptible to injury or makes the harm worse, the defendant is generally still responsible for the full extent of the harm caused.

One of the most common insurance defense tactics in Delaware personal injury cases is to point to a plaintiff’s prior medical history and argue the injury was already there. While pre-existing conditions are relevant, Delaware law does not allow defendants to escape liability simply because the plaintiff was vulnerable. The eggshell plaintiff rule levels the field.

The Detailed Answer

What the Eggshell Plaintiff Rule Means

The eggshell plaintiff rule provides that a tortfeasor is liable for the full extent of the harm they cause, even if the plaintiff was unusually fragile. If a minor rear-end collision causes severe symptoms in a plaintiff with pre-existing degenerative disc disease, the defendant cannot reduce damages by pointing to that prior condition. The plaintiff is taken as they are found.

Aggravation of Pre-Existing Conditions

Delaware juries are commonly instructed that a defendant is responsible for the aggravation of a pre-existing condition. The plaintiff must show that the accident worsened the condition or accelerated symptoms beyond their natural course. Medical evidence — usually from treating physicians and qualified medical professionals — establishes the difference between pre-accident and post-accident status.

What the Defense May Argue

The defense will often try to:

  • Show the plaintiff already had similar symptoms before the accident
  • Point to gaps in pre-accident treatment to suggest the condition was active
  • Argue current symptoms reflect the natural progression of an underlying disease, not the accident
  • Focus on inconsistencies in the plaintiff’s reporting of prior issues

How Plaintiffs Counter These Arguments

Effective responses include:

  • Comprehensive pre-accident records showing baseline function
  • Treating physician testimony comparing pre- and post-accident status
  • Functional capacity evaluations
  • Honest, complete disclosure of medical history during discovery

Honesty Matters

One of the worst things a plaintiff can do is conceal a prior injury. Pre-existing conditions are usually discoverable through insurance records, prior providers, and pharmacy histories. Concealment damages credibility and may convert a strong case into a difficult one.

What This Means for Your Case

Having a pre-existing condition does not bar recovery in Delaware. What matters is the change between your condition before the accident and after. With proper documentation, qualified medical analysis, and a credible presentation, plaintiffs with prior medical histories can and do recover full damages.

Related Questions

Q: What if I had a prior accident and never fully healed?

That is precisely the situation the eggshell plaintiff rule was designed to address. You may still recover for aggravation caused by the new accident.

Q: Will my prior medical records be turned over to the defense?

Yes. Filing a personal injury claim places your medical condition at issue. Records relevant to your injuries are typically discoverable.

Q: How do I prove my condition got worse?

Treating physician testimony, comparison of imaging studies, and qualified medical professional analysis are common methods.

When to Talk to a Delaware Personal Injury Lawyer

Pre-existing conditions are a normal and manageable part of many Delaware injury cases. Schuster Jachetti LLP has experience handling Delaware personal injury claims involving complex medical histories. Visit our attorney page or call to discuss your case.

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Joseph M. Jachetti
Reviewed by Joseph M. Jachetti Delaware Bar #003744 · Licensed December 1998 · Status: Active

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Joseph M. Jachetti
Reviewed by Joseph M. Jachetti Delaware Bar #003744 · Licensed December 1998 · Status: Active
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