Metagnosis

"This book identifies and names the phenomenon of metagnosis: the experience of newly learning in adulthood of a longstanding condition. It can occur when the condition has remained undetected (e.g. colorblindness) and/or when the diagnostic categories themselves have shifted (e.g. ADHD). More broadly, it can occur with unexpected revelations bearing upon selfhood, such as surprising genetic test results. This phenomenon has received relatively scant attention, yet learning of an unknown condition is frequently a significant and bewildering revelation, subverting narrative expectations and customary categories"--