undiagnosed

adj

1. (not-comparable)That had not been diagnosed.

   “After the accident, a sleep study identified that the GBRf driver had previously undiagnosed severe Obstructive Sleep Apnoea.”

   “But what if you have an odd or quirky symptom besides snoring? You and your loved ones may have no idea that you are in danger, and the condition could go undiagnosed for years.”

   “The chronic condition affects around 8% to 13% of women and girls of reproductive age worldwide, according to the World Health Organization, but as many as 70% could be experiencing PCOS while undiagnosed.”

verb

1. (form-of, participle, past)simple past and past participle of undiagnose