Diagnostic Uncertainty – Why Precise Diagnosis and Clear Communication Change the Course

An unclear diagnosis is a normal part of musculoskeletal care, not an exception. A recent systematic review of 26 qualitative studies and 462 patients shows that diagnostic uncertainty isn't experienced the same way from person to person – and how that uncertainty is communicated can matter just as much as the diagnosis itself for how the patient copes with the course of their condition.

What diagnostic uncertainty actually means for the patient

Uncertainty around a diagnosis is rarely just about "not knowing what it is." The research points to an experience that spans several interconnected dimensions: how the patient understands their condition (cognitive), how they feel about it (affective), how it affects daily function, and how it affects relationships and social roles. The same clinical picture can therefore feel completely different from one patient to the next, depending on what they expect a diagnosis to give them – reassurance, an explanation, or access to further investigation.

Why getting the diagnosis right isn't enough on its own

The label attached to a condition matters, not just the accuracy behind it. A systematic review of randomized trials found that specific diagnostic labels can increase patients' preference for imaging and surgery, and make a condition feel more serious than necessary – while a more general explanation often produces more positive recovery beliefs.

A qualitative study of hospital consultations found something similar: when an MRI is described as "completely normal" without further explanation, that isn't necessarily reassuring to the patient – rather, it can feel like something is still unexplained. How a finding, or the absence of one, is communicated therefore affects both fear and expectation, not just understanding.

Communication is a clinical intervention in itself

When uncertainty can't be resolved immediately, how we communicate becomes part of the treatment itself. A review of how diagnostic uncertainty is communicated in primary care points to patient-centred strategies – acknowledging what isn't known, while being clear about what is known and what the next step is – as producing a better patient experience than avoiding the topic. This connects to a broader finding from physiotherapy research: patient-centred communication, where the clinician listens actively and shows that the patient's concerns are taken seriously, is clearly associated with a stronger therapeutic alliance – which in turn is one of the most consistent drivers of good treatment outcomes.

The diagnosis affects whether you actually follow through with treatment

This isn't just a theoretical link. A systematic review of randomized trials in chronic low back pain found that patients' pre-treatment expectations – shaped in part by how the diagnosis and prognosis were presented – were associated with actual outcomes, including pain and function. A patient who understands why an approach was chosen, and has a realistic expectation of the course ahead, generally follows through better than a patient left unsure what's actually wrong with them. That's one reason I take the time to explain a finding, not just state it.

Diagnostic ultrasound as a tool against uncertainty

Some of the uncertainty arises because symptoms alone rarely reveal exactly which tissue is the source. Diagnostic ultrasound is well documented for exactly this: for suspected rotator cuff injury in the shoulder, ultrasound has high accuracy compared with surgical findings, and also allows a course to be followed over time, not just assessed as a single snapshot. Where a diagnostic block or injection treatment is needed, I perform this under ultrasound guidance – it makes both the diagnosis and the treatment more precise, and reduces uncertainty about what we're actually treating.

How we know a treatment is actually working

Even with a clear diagnosis, uncertainty isn't necessarily over – the course still needs to be confirmed along the way. I use your symptom trend as the guide: if a treatment is working, symptoms should at minimum not worsen, and should decrease over time. If they go the other way, we adjust course rather than continuing unchanged. That gives a clear, shared sense of whether we're on the right track – which in itself reduces uncertainty throughout treatment.

Sources

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