Key point: the accident need not be the sole cause of the medical condition to be relevant, but its contribution must be demonstrated and defined as far as objective evidence permits.
01 / Starting point
What is a pre-existing condition.
It is a disease, injury, anatomical change or functional limitation present before the accident. It may have been known and treated, documented without significant symptoms or discovered only during investigations after trauma.
Its identification does not end the analysis. The medico-legal question is whether the accident produced an additional change: a new injury, objective aggravation, decompensation or symptoms compatible with the mechanism.
It is equally important to consider whether the observed course is better explained by the prior disease independently of the accident. This forms part of causation analysis.
02 / Possible relationships
Three situations to distinguish.
- 1
A new injury caused by the accident
Trauma produces a change that did not exist before, such as a fracture, wound or rupture documented afterwards and compatible with the mechanism.
- 2
Aggravation or decompensation
The accident does not create the whole pathology but changes its course: worsening symptoms, adding structural damage, reducing function or making a stable condition symptomatic.
- 3
Natural progression or temporal coincidence
The condition progresses through its own mechanisms without a demonstrable traumatic contribution. Diagnosis after the accident alone is insufficient for attribution.
The same diagnosis may have different causal significance in different cases. The conclusion depends on chronology, mechanism, examination, investigations and comparison with baseline.
03 / Method
Identifying the part
attributable to the accident.
The analysis starts with baseline health and follows the medical difference after the event. It correlates:
- prior symptoms, diagnoses and limitations;
- accident mechanism and exposed body region;
- objective initial findings;
- changes on later investigations;
- new treatment required and response;
- functional progress and persistent consequences;
- other medical causes or trauma capable of explaining the result.
The conclusion may identify full contribution, limited aggravation, interaction between trauma and prior health, or insufficient evidence for attribution.
04 / Comparison
Records before and
after the accident.
The strongest distinction comes from comparing earlier records with those prepared immediately and later. Useful material includes prior consultations and investigations, existing treatment, prehospital and emergency records, hospital and operative notes, comparable radiology, specialist and rehabilitation records, and evidence of prior and later function.
Missing earlier records do not exclude every conclusion but may limit the precision with which baseline and traumatic consequence can be separated.
05 / Investigations
What imaging can and
cannot show.
X-ray, CT or MRI may identify structural changes but do not determine their origin alone. Some findings are clearly traumatic; others may be degenerative, old or non-specific.
The examination date is not automatically the date on which every finding arose. Interpretation requires the mechanism, symptom location, clinical findings, earlier images and progress.
- what is objectively shown;
- what may be attributed to the accident;
- what probably represents a prior condition;
- what cannot be dated or separated with adequate certainty.
06 / Illustrative example
Degenerative changes
of the spine.
A person may have degenerative or disc changes before the accident, with or without symptoms. Pain, neurological signs or functional limitation may appear afterwards. Neither the degenerative findings nor the later symptoms answer causation on their own.
The assessor considers whether the mechanism could load the segment, whether symptom chronology is coherent, whether clinical findings agree, whether images show acute features and how the situation compares with prior records.
The result may be a new traumatic injury, temporary exacerbation, persistent aggravation or a course without sufficiently demonstrated traumatic contribution. The example cannot be applied automatically to an individual case.
07 / Trauma score
Pre-existing health and
the REMA report.
Not every diagnosis found after the accident is scored. The initial injuries, complications and permanent consequences causally related to the event must be identified.
If the accident aggravated a prior condition, the analysis focuses on the difference attributable to trauma and whether it is temporary or permanent. Timing matters where progress is not stable; see complications and permanent sequelae and the difference between the certificate and REMA report.
08 / Limits of the conclusion
When the distinction remains uncertain.
Evidence may permit only a qualified conclusion, especially where there are no prior records, presentation was delayed, symptoms lack objective correlates, records conflict, disease is fluctuating or progressive, later trauma or competing causes exist, or investigations cannot date the changes.
A correct conclusion states not only what is supported but also documentary limitations and the degree of certainty.
09 / Frequently asked questions
Important clarifications.
Does a pre-existing condition exclude compensation for the accident?+
Not automatically. The assessment must determine whether the accident caused a new injury, aggravated the prior condition or made no medically demonstrable contribution. The consequence attributable to the accident is assessed individually.
Does an MRI performed after the accident prove that every finding is traumatic?+
No. It shows the changes present when performed, but their origin requires correlation with mechanism, symptoms, clinical examination, prior records and subsequent progress.
If there were no symptoms before the accident, is the condition automatically new?+
No. A pre-existing change may have been asymptomatic. The accident may nevertheless make it symptomatic or aggravate it, which must be documented and reasoned.
Are all diagnoses discovered after the accident scored in a REMA report?+
No. Only injuries, complications and consequences for which causation with the accident can be supported under the applicable method and schedule are relevant.
Why are pre-accident medical records important?+
They describe the baseline: diagnoses, symptoms, functional limitations and treatment. Comparing the situation before and after helps define the contribution of trauma.
10 / Sources
Framework consulted.
- ASF/Ministry of Health Order no. 1/2,293/2022
- Official trauma score schedule
- Procedural rules for medico-legal work
This information is general. Individual application requires review of the records, traumatic mechanism, prior condition and medical progress.