Attention-Deficit/Hyperactivity Disorder vs Bipolar II Disorder and Cyclothymic Disorder
Attention-Deficit/Hyperactivity Disorder and Bipolar II Disorder and Cyclothymic Disorder are easy to mix up on the boards. Here's a side-by-side comparison — presentation, workup, imaging, and first-line treatment — drawn from our full outlines.
Attention-Deficit/Hyperactivity Disorder vs Bipolar II Disorder and Cyclothymic Disorder at a glance
- Attention-Deficit/Hyperactivity Disorder: Persistent inattention and/or hyperactivity-impulsivity present before age 12 with cross-setting impairment.
- Bipolar II Disorder and Cyclothymic Disorder: Mood disorders with hypomanic (not manic) episodes; bipolar II has full depressive episodes, cyclothymia has chronic subthreshold oscillation.
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Side-by-side comparison
| Feature | Attention-Deficit/Hyperactivity Disorder | Bipolar II Disorder and Cyclothymic Disorder |
|---|---|---|
| At a glance | Persistent inattention and/or hyperactivity-impulsivity present before age 12 with cross-setting impairment. | Mood disorders with hypomanic (not manic) episodes; bipolar II has full depressive episodes, cyclothymia has chronic subthreshold oscillation. |
| Classic presentation | Inattention: careless mistakes, difficulty sustaining attention, doesn't listen, fails to follow through, organization difficulties, avoids sustained mental… | Patient presents with depression and reports past 'best week of my life' periods of needing only 3 hours of sleep, completing massive projects, and spending… |
| Workup / key labs | DSM-5-TR: (A) >=6 inattention and/or >=6 hyperactivity-impulsivity symptoms for >=6 months in children, or >=5 for individuals age 17 and older; (B) Several… | Bipolar II: ≥1 hypomanic episode (≥4 days, ≥3 of 7 symptoms, observable change, no marked impairment/psychosis/hospitalization) + ≥1 MDE; never met manic… |
| Imaging | Not routinely indicated | Not routinely indicated; Neuroimaging if first episode late-life or focal neurologic findings |
| First-line treatment | Behavioral parent training and classroom interventions — first-line in preschool age (4-5 years) and adjunct at all ages; Stimulant — methylphenidate,… | Bipolar II acute depression: quetiapine (best evidence), lurasidone, cariprazine, or lumateperone; Bipolar II maintenance: lithium (anti-suicide benefit),… |
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