Written by

Nermeen Salahuddin - Trainee Solicitor

In the complex world of healthcare, accurate diagnosis is essential for effective treatment and patient well-being. However, the unfortunate reality is that misdiagnosis can occur; leading to a range of challenges for both patients and healthcare providers. This article focuses on misdiagnosis; exploring its definition, causes, effects, and prevalence; as well as commonly misdiagnosed conditions, and any preventive measures patients and healthcare providers may be able to take. 


What is misdiagnosis? 

Misdiagnosis occurs when a healthcare professional inaccurately identifies a patient’s condition or provides an incorrect explanation of their symptoms. This can result in inappropriate treatments, delayed interventions, and countless complications. The reasons behind misdiagnosis are multifaceted and often stem from a combination of factors, which we’ll explore below. 


Why and how does misdiagnosis happen? 

Misdiagnosis is a complex issue rooted in a combination of systemic, cognitive, and interpersonal factors within the healthcare environment. One significant factor is the complexity of certain medical conditions; such as endometriosis, as an example. Diseases or conditions with diverse and overlapping symptoms, or those presenting atypical manifestations, pose a considerable challenge for accurate diagnosis. Furthermore, time constraints faced by healthcare professionals can contribute to misdiagnosis, as the pressure to make rapid decisions may lead to shortcuts being taken and oversights being made. 

Inadequate communication among healthcare providers can also play a pivotal role in misdiagnosis. When information about a patient’s medical history, symptoms, or test results are not effectively shared and understood, it increases the likelihood of errors. Additionally, patient-related factors, such as incomplete or inaccurate reporting of symptoms, can further complicate the diagnostic process. 

Another contributing factor is the cognitive biases that healthcare professionals may unknowingly bring into their decision-making process. Confirmation bias, where a clinician might favour information confirming preconceived thoughts, and anchoring bias, where initial impressions heavily influence subsequent decisions, can both also lead to tunnel vision and diagnostic errors. 

Systemic issues within the healthcare system, including inadequate access to diagnostic tools, inconsistent quality in healthcare delivery, and variations in clinical practices, can also contribute to misdiagnosis. The increasing reliance on technology, while providing valuable diagnostic capabilities, introduces its own set of challenges, including the potential for misinterpretation or oversights in the analysis of diagnostic results. 

Misdiagnosis is a complex issue that can occur at various stages of the healthcare process, each influenced by distinct factors. Starting with the initial patient-symptom assessment, misdiagnosis may result from the subtle interplay of cognitive biases and heuristics. Healthcare professionals, under time constraints and facing a large amount of information, might inadvertently succumb to cognitive shortcuts that impact their judgment. Anchoring on initial impressions, or being swayed by recent experiences, can lead to overlooking crucial diagnostic cues and result in an inaccurate assessment. 

Overall, there is no single reason that misdiagnosis occurs; and it most likely occurs because of a combination of factors mentioned in this article. 


The effects of misdiagnosis on patients 

Misdiagnosis has far-reaching consequences for patients, impacting their physical well-being, mental health, and overall quality of life. One of the immediate effects is the potential for unnecessary treatments. Patients may undergo surgeries, receive medications, or therapies that are not only ineffective but can also introduce new health risks. Unwarranted medical interventions not only pose physical harm but also contribute to emotional distress and financial burdens on patients and their families.  

Delay in appropriate treatment is another significant consequence of misdiagnosis. As healthcare professionals focus on managing a condition that the patient does not have, the actual underlying issue persists and may progress to advanced stages. This delay in intervention can result in more severe health complications, reduced treatment options, and poorer long-term outcomes for the patient. An example of this, is one of our client’s who received chemotherapy for the wrong cancer; causing avoidable pain and suffering and prolonging their cancer treatment. Furthermore, delaying the diagnosis of cancer may lead to the cancer progressing to a more advanced stage – and the prognosis becoming more serious for the patient.  

Receiving a misdiagnosis can lead to emotional distress, anxiety, and a loss of trust in the healthcare system. Patients may experience frustration, confusion, and a sense of helplessness as they face the realisation that the treatment, they received was unnecessary or, worse, that their true condition was left unaddressed. 

In some cases, misdiagnosis may lead to the development of secondary health issues. The side effects of unnecessary medications or treatments can cause new health problems, creating a range of complications. Additionally, the stress and anxiety associated with a misdiagnosis can contribute to the exacerbation of existing health conditions or the onset of psychosomatic symptoms. 

Financial implications may be another burden for patients. Unnecessary medical procedures and treatments not only incur direct costs but may also lead to indirect costs such as missed workdays. The collective financial strain can have long-lasting effects on the economic well-being of affected individuals and their families. 

In conclusion, the effects of misdiagnosis on patients extend beyond the initial inaccuracy in diagnosis. The physical, emotional, and financial toll underscores the urgency of addressing the root causes of misdiagnosis and implementing strategies to enhance diagnostic accuracy within the healthcare system. 


How common is misdiagnosis? 

While precise statistics on misdiagnosis rates are challenging to determine, studies suggest that diagnostic errors are not uncommon in healthcare settings. The variability in reported rates underscores the need for ongoing efforts to enhance diagnostic accuracy and reduce the chances of misdiagnosis. 

Some statistics suggest that 11% of medical conditions may be misdiagnosed. The likelihood of misdiagnosis can be dependent on the type of condition and the symptoms overlapping with other conditions. 


What conditions are most commonly misdiagnosed? 

Certain medical conditions are more prone to misdiagnosis due to their complex nature, variability in symptoms, or rarity. Conditions such as bowel cancer, endometriosis and neurological diseases may be challenging to identify accurately, leading to higher rates of misdiagnosis. 

In data released by the NHS for the period 2017/2018 to 2020/2021 based on what injury/disease had the largest number of successful claims, where the primary cause was failure/delayed diagnosis or wrong diagnosis, the top five were: 

  1. Unnecessary pain  
  2. Fatality  
  3. Unnecessary operations  
  4. Cancer 
  5. Fracture 

You can read more about the most common misdiagnosis claims here. 


How can misdiagnosis be avoided? 

Limiting the risk of misdiagnosis involves a comprehensive approach. Improved communication among healthcare professionals, enhanced training in critical thinking and diagnostic skills, and leveraging technology responsibly are crucial steps. Additionally, fostering a culture of continuous learning and feedback within healthcare organisations can contribute to a more accurate and patient-centric diagnostic process. 

The NHS has a Patient Safety Strategy in place and is constantly developing this strategy to try and reduced= the risk of patients being misdiagnosed and stay ahead of any challenges that may arise in the future. 



Understanding and addressing the complexities surrounding misdiagnosis is essential to reducing diagnostic errors. By acknowledging the factors contributing to misdiagnosis, implementing preventive measures, and encouraging a commitment to diagnostic accuracy, healthcare providers can strive to minimise the impact of misdiagnosis on patient outcomes and overall healthcare quality.

Concerned about your medical treatment?

Contact us today!

"*" indicates required fields