Differential Diagnoses for Major Depressive Disorder

Psychiatric Differential Diagnoses

The American Academy of Pediatrics recommends assessing patients with suspected MDD for Persistent Depressive Disorder (Dysthymia), characterized by chronic depressive symptoms lasting at least 2 years but not meeting full MDD criteria, requiring evaluation for duration and severity patterns 1
The American Academy of Pediatrics suggests evaluating patients for Adjustment Disorder with Depressed Mood, which involves depressive symptoms occurring within 3 months of an identifiable stressor but not meeting full MDD criteria 1
The American Academy of Pediatrics recommends assessing patients for Anxiety Disorders, which have high comorbidity rates with MDD and can present with overlapping symptoms like insomnia, fatigue, and concentration difficulties 1
The American Academy of Pediatrics suggests evaluating patients for Eating Disorders, such as anorexia and bulimia nervosa, which frequently co-occur with depressive symptoms 1
The American Academy of Pediatrics recommends assessing patients for Post-Traumatic Stress Disorder, which shares symptoms of anhedonia, sleep disturbance, and concentration problems with MDD 1

The American Academy of Pediatrics recommends conducting direct patient and family interviews to assess symptom onset, duration, and functional impairment across various settings 1
The American Academy of Pediatrics suggests obtaining collateral information from teachers or other observers when available, as patients may not clearly identify depressed mood as their chief complaint 1
The American Academy of Pediatrics recommends conducting a systematic assessment for comorbid psychiatric conditions using standardized instruments, as high comorbidity rates affect diagnosis and treatment 1