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Does Diagnostic Overshadowing Hinder Late Autism Diagnosis? 

Posted
Updated
ByMy Patient Advice
Author: Beatrice Holloway, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Diagnostic overshadowing in adults can significantly hinder the accurate diagnosis of autism, often leading to misdiagnosis. This creates assessment challenges for healthcare providers to attribute symptoms to a more apparent or existing condition, overshadowing the possibility of autism. For adults, this can result in symptom confusion and a failure to recognise autism, which often leads to long delays in diagnosis. 

When diagnostic overshadowing occurs, key indicators of autism: such as social difficulties, sensory sensitivities, and repetitive behaviours may be dismissed or misattributed to other conditions like anxiety, depression, or ADHD. This leads to wrong diagnosis and incorrect treatment plans, preventing individuals from receiving the appropriate care. 

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How Diagnostic Overshadowing Affects Adult Autism Diagnosis 

Here’s how diagnostic overshadowing complicates the recognition of autism: 

Misinterpretation of Symptoms:

Social challenges, repetitive behaviours, or rigid thinking patterns may be misdiagnosed as symptoms of other conditions, such as anxiety or depression, leading to inaccurate treatment. 

Missed Opportunities for Appropriate Care:

When autism is overlooked, adults may not receive the necessary therapies or accommodations to improve their daily lives, resulting in prolonged struggles. 

If you suspect this overshadowing is affecting your ability to get an autism diagnosis, seeking a specialist’s opinion can provide clarity.  

Visit providers like Autism Detect for personal consultations tailored to your needs. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to late diagnosis in adults. 

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Beatrice Holloway, MSc
Author

Beatrice Holloway is a clinical psychologist with a Master’s in Clinical Psychology and a BS in Applied Psychology. She specialises in CBT, psychological testing, and applied behaviour therapy, working with children with autism spectrum disorder (ASD), developmental delays, and learning disabilities, as well as adults with bipolar disorder, schizophrenia, anxiety, OCD, and substance use disorders. Holloway creates personalised treatment plans to support emotional regulation, social skills, and academic progress in children, and delivers evidence-based therapy to improve mental health and well-being across all ages.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS
Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy. 

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