When a Pre-Existing Condition Becomes the Defense: Separating Old Pain From New Injury

Chicago adults rarely arrive as blank slates. Many people have prior back, knee, or shoulder issues long before a fall in a grocery aisle, a slick vestibule, a parking garage, or a stairwell in a multi-unit building. City life encourages people to push through discomfort until one incident changes the baseline.

That reality is also why insurers rely on common defenses in slip-and-fall cases. They review old imaging, prescriptions, and prior therapy. They quote words like “degenerative,” “chronic,” and “age-related” to suggest the fall changed nothing.

We do not accept that shortcut. Our work is to separate baseline from change and then, through medical documentation, demonstrate how the fall worsened your condition. Prior history can help by showing what was stable before and what changed afterward.

How Pre-Existing Condition Defenses Are Built

Most pre-existing condition arguments are assembled from three familiar pieces: selective imaging comparisons, treatment gaps framed as doubt, and medical vocabulary treated like a verdict.

Prior Imaging Comparisons

Defense reviewers often line up an older MRI or X-ray next to a post-fall study and argue that similarity means no new injury. Many people, though, carry findings for years without meaningful limitation. A disc bulge or arthritis can exist in the background while a person works, commutes, and lives normally.

We treat imaging as part of a timeline. Older imaging can show the pre-fall state. Post-fall imaging can show interval progression, a new tear pattern, new swelling, or new nerve involvement. Even when the report language looks similar, details can change in level, severity, or laterality. The stronger approach is clinical correlation: the image, the exam, and the symptom pattern should match.

Old Treatment Gap Arguments

A gap in treatment gets turned into a credibility test: “If it was serious, you would have been treated continuously.” Chicago reality is more complicated. People pause care when symptoms calm, insurance changes, schedules collapse, or finances tighten. Some self-manage a stable condition for years.

A gap does not end a claim. It does mean we must document function during the gap and compare it to the post-fall period. Were you working full duty? Managing stairs and errands? Then, after the fall, did you need restrictions, new medication, therapy, injections, or a surgical consult? Those changes are evidence of aggravation.

Degenerative Language Interpretation

“Degenerative” and “age-related” describe common findings. They do not prove that the fall was irrelevant. Degeneration can be stable. Chronic pain can be controlled. A fall can aggravate an existing condition by increasing symptoms, triggering new patterns, or accelerating decline. The question is what changed after the incident, not whether a label existed before.

Where Medical Records Decide The Case

Medical records usually determine whether the file reads as old pain continuing or a new injury. We focus on three areas: symptom change, functional decline, and objective support.

Symptom Change Documentation

Early visits matter because they capture timing. A strong record helps distinguish baseline discomfort from new post-fall symptoms, such as radiation down an arm or leg, numbness, weakness, buckling, spasms, headaches, or sleep disruption. It can also capture a shift in intensity and frequency.

We encourage clients to be accurate and specific. Mention prior history, then explain what is different now. Providers document aggravation more clearly when they understand the pre-injury level and the post-fall change.

Functional Decline Evidence

Function persuades when scans look familiar. Many people have imperfect vision and still live normally. The case strengthens when the record shows what daily life is lost after the fall: missed work, reduced hours, lifting limits, sitting or standing limits, difficulty with stairs, trouble driving, or a new need for help at home.

This is where baseline becomes real. Before the fall, you may have had occasional soreness but continued full activity. After the fall, you may need modified duty, frequent breaks, a brace, or a cane. When providers document these differences, “baseline versus change” becomes measurable.

Post-Fall Imaging Changes And Objective Findings

Sometimes imaging draws a bright line, such as a fracture or a full-thickness tear. More often, support comes from correlations among imaging, exam, and symptoms. Objective findings can include range-of-motion limits, positive orthopedic tests, neurologic deficits, and consistent tenderness patterns.

Specialist causation opinions often connect the dots. A treating orthopedist, neurologist, or spine specialist can explain why the fall mechanism fits the new presentation and why the records support aggravation. The most helpful opinions are based on exam findings, imaging review, and a clear baseline. They also address competing explanations and explain why timing supports the incident as the driver of worsening.

Building Baseline Versus Change In Real Chicago Routines

Baseline refers to what you could do before the fall, and which symptoms were stable, predictable, or manageable. Change refers to what the fall added, how it altered daily functioning, and what medical care became necessary.

We build that comparison with details that match real routines. How long could you stand at work? How far could you walk between CTA stops? Could you carry groceries up a walk-up? Were you managing winter sidewalks and normal errands without needing frequent rest? Then we document what changed after the incident, including any new restrictions, missed time, and updated treatment plans. This keeps the focus on measurable worsening, rather than on a diagnosis code pulled from an old chart.

Illinois Pattern Jury Instructions On Aggravation Of Pre-Existing Conditions

Illinois law allows recovery when negligence worsens an existing condition, and jurors are instructed accordingly. The Illinois Pattern Civil Jury Instructions are published by the Office of the Illinois Courts, with the full set available on the Illinois Courts website.

Within those instructions, IPI Civil 30.21 addresses aggravation of a pre-existing condition in damages. In substance, it tells jurors they may not deny or limit damages because an injury resulted from an aggravation of a pre-existing condition or because a pre-existing condition made the person more susceptible to injury.

That legal framing matches what medicine shows. People start with different bodies and vulnerabilities. Negligence can still cause harm by worsening an existing problem. The focus remains on the post-incident change and the resulting functional impairment.

Recurring Themes In Defense Narratives

Pre-existing condition defenses tend to reuse the same small set of themes, and we see them repeat across cases with only minor changes in wording, emphasis, and the medical records they choose to highlight.

“Natural Degeneration”

This theme argues that the decline would have happened anyway. We answer with a dated timeline showing stable function before the fall and a clear change afterward, supported by new restrictions, escalated care, and objective findings.

“Age-Related Changes”

This theme uses age as an explanatory proxy. Age can increase vulnerability, and property owners still owe a duty of reasonable care. We counter with concrete pre-fall activity and concrete post-fall limitations.

“Chronic Condition Continuation”

This theme claims nothing changed. We respond with comparisons: new symptom patterns, new neurologic signs, medication escalation, new referrals, and new restrictions not part of the baseline.

Turning Medical History Into A Clear Story

A pre-existing condition becomes the defense when the baseline is unclear or a change is not captured. A clear before-and-after record brings the case back to what matters: what the fall worsened and how that worsening limited life.

If you are being told your injury was “already there,” you are not alone. We stand with you, and we’re here to help you demonstrate that the records show a real post-incident decline. If you are looking for a Chicago slip and fall injury lawyer, Jonathan Rosenfeld and our firm are ready to review the timeline, define the baseline, and present what changed with clarity.