Polysomnography is a test commonly used for diagnosing some sleep disorders. Unless diagnosing genetic disorders during childhood and start early intervention can reduce morbidity or mortality. Variations in individuals are identified by diagnosing and monitoring the underlying disorders. Several standardized test batteries exist for diagnosing and classifying aphasias. Consider the example of a medical test for diagnosing a disease. Other disorders need to be ruled out before diagnosing major depressive disorder. They are not designed for the purpose of diagnosing auditory processing disorders. Evidence is insufficient to determine how accurate the IQCODE is for diagnosing or predicting dementia. Both manuals provide similar criteria for diagnosing the disorder. The main goal in diagnosing NCGS is to exclude celiac disease. White blood cell differential results are useful in diagnosing and monitoring various medical conditions. Additionally, MRI has been shown to be effective in diagnosing chronic exertional compartment syndrome. The breast biopsy is usually the test used to confirm the suspected diagnosing. No specific lab tests exist for diagnosing polyarteritis nodosa. She also undertook the cognitive testing used for diagnosing dementia with a neuropsychiatrist.