Many pathology-related cases already contain the seeds of a discordance finding before any expert is retained. An original biopsy report, an outside consultation that reached a different conclusion, an amended diagnosis, a second opinion that changed the staging — these are common facts in pathology cases. What is less common is counsel knowing early whether the discordance is material.
That is exactly what Diagnostic Discordance Review — the fourth domain of the Pathology Vulnerability Assessment — is designed to answer.
Sentinel does not independently review glass slides, render a diagnosis, or determine which pathology interpretation is correct. Diagnostic Discordance Review identifies whether the pathology record contains materially different diagnostic conclusions, classifies the significance of that discordance, and advises counsel whether it warrants pathologist review, targeted discovery, or additional record development. This is record analysis — not diagnostic adjudication.
What Is Diagnostic Discordance?
Diagnostic discordance exists when two or more pathology opinions — based on the same specimen or the same clinical episode — reach materially different diagnostic conclusions. It is not the same as a simple wording difference. Two reports can use different terminology and still be saying essentially the same thing. The question is whether the diagnostic conclusions are interchangeable — and if they are not, what that difference means.
Discordance arises in several common patterns:
- Original report vs. outside consultation — the treating institution issued one diagnosis; a second institution reached a different one
- Original report vs. amended report or addendum — the same pathologist or institution changed a clinically significant finding after initial issuance
- Original report vs. referral institution diagnosis — the patient was transferred and the receiving institution's pathology department reached a different conclusion
- Grading or staging discordance — both reports identify malignancy but disagree on grade, stage, or margin status in ways that affect treatment decisions and damages
- Benign vs. malignant discordance — the most consequential type; one report identifies malignancy, another does not
- Prior biopsy not recognized — an earlier specimen whose significance was not appreciated at the time, later identified as relevant in a subsequent review
Why It Matters Before You Retain an Expert
The instinct when confronted with two conflicting pathology reports is to retain a physician pathologist to determine which diagnosis is correct. That is sometimes the right next step — but it is not always the first step. Before committing to that expense, counsel benefits from knowing:
- Are the two diagnoses actually different, or is this a terminology variation?
- If they are different, is the difference material to the claim — does it affect staging, treatment, prognosis, or damages?
- Is there a process failure underlying the discordance — a sampling adequacy issue, a communication failure, an amended report that was not properly handled?
- What specific records and discovery should be targeted to understand the basis for the discordance?
Those questions do not require a physician pathologist to answer. They require someone who can read the pathology record, understand what the reports say, recognize whether the conclusions are interchangeable, and advise counsel on what the discordance means procedurally and strategically. That is what Diagnostic Discordance Review delivers.
A Screening PVA with Diagnostic Discordance Review costs $1,250. A physician pathologist retained to adjudicate which diagnosis is correct typically costs multiples of that — and may ultimately tell you the discordance is not material. Knowing whether to make that investment before making it is the practical value of the Discordance Review.
The Five Classification Levels
Not all discordance is equal. The PVA classifies discordance findings across five levels, each carrying a different implication for case strategy:
What the Discordance Review Examines
The Diagnostic Discordance Review is a structured examination of the pathology record, not a microscopic re-evaluation. It addresses the following questions:
- Do multiple pathology reports reach different diagnostic conclusions?
- Are the diagnostic terms materially different, or is this a terminology variation?
- Was an outside consultation obtained, and if so, what was its conclusion relative to the original report?
- Was an amended report or addendum issued, and did it change a clinically significant finding?
- Was any change in diagnosis clearly communicated to the treating physician?
- Was clinical care initiated or continued in reliance on a diagnosis that was later changed?
- Does the discordance suggest a process failure — a sampling adequacy issue, a quality control gap, or a communication breakdown — in addition to a diagnostic disagreement?
- Does the discordance warrant pathologist review, and if so, what should that review focus on?
The Boundary That Protects Everyone
The scope limitation in Diagnostic Discordance Review is not a weakness — it is a feature. Sentinel identifies that two reports differ and explains why that difference may be significant. Sentinel does not say which pathologist was right. That determination is for a physician pathologist with the slides in hand.
What this means practically:
- Safe to say: "The pathology record contains materially different diagnostic conclusions between the original report and the outside consultation."
- Safe to say: "The discordance is material and warrants pathologist review to determine which interpretation is correct and why."
- Outside scope: "The original pathologist was wrong."
- Outside scope: "The correct diagnosis is X."
The distinction protects the integrity of the PVA, keeps Sentinel within the PA(ASCP) credential scope, and gives counsel a clean work product that leads to the right next step rather than overclaiming before the physician expert has weighed in.
Many pathology cases already involve an original report, an outside consultation, an amended diagnosis, or a second opinion. Before paying a physician pathologist to adjudicate which conclusion is correct, a Screening PVA can tell you whether the discordance is material — and what the pathologist should focus on when you do retain one.
What Discovery to Target
When a discordance finding warrants further development, the following records and discovery targets are typically relevant:
- The original pathology report and all subsequent amendments, addenda, and outside consultation reports
- The outside consultation request — who initiated it, why, and when
- The outside institution's gross examination and processing records for any re-reviewed material
- Communication records between the pathologist and treating physician regarding any changed diagnosis
- Clinical records showing treatment decisions made in reliance on the original diagnosis
- Any quality management records related to the discordant case — peer review, tumor board discussion, or nonconformance documentation
- The original glass slides and tissue blocks — their location, custody, and availability for independent review