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undiagnosed

British  
/ ˌʌndaɪəɡˈnəʊzd /

adjective

  1. (of a medical condition, a problem, etc) not having been identified

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He tragically died from an undiagnosed heart condition at the age of 20 in May 2024.

From BBC

They say that the universal recommendation for hepatitis B shots protects infants whose mothers have an undiagnosed hepatitis B infection, or who are exposed to hepatitis B in the first weeks of their lives.

From Barron's

Symptoms of autoimmune disease are often mistaken for normal signs of aging, leaving the disorder undiagnosed for years.

From The Wall Street Journal

Glaucoma, a major cause of irreversible blindness in older adults, often goes undiagnosed until significant vision loss has already occurred.

From Science Daily

With no definitive tests, many patients have gone undiagnosed or misdiagnosed for years.

From Science Daily