A 28-year-old woman from Delhi presents to the psychiatry outpatient department with a 3-week history of elevated mood, increased goal-directed activity, and decreased need for sleep (4 hours per night). She reports starting three new business ventures simultaneously and has spent ₹2 lakhs on impulsive shopping. Her husband reports she has been unusually talkative and her speech is rapid and difficult to interrupt. There is no history of psychotic symptoms. She denies any depressive episodes in the past. On examination, she is well-groomed, psychomotor activity is increased, and affect is expansive. What is the most likely diagnosis?

Explanation

## Diagnosis: Bipolar Disorder I with Current Manic Episode ### Clinical Presentation Analysis This patient meets full criteria for a **manic episode** as per DSM-5: - **Duration:** 3 weeks (≥7 days required) - **Mood:** Elevated, expansive - **Decreased need for sleep:** 4 hours without fatigue - **Increased goal-directed activity:** Three new business ventures - **Impulsivity:** ₹2 lakhs spent on shopping - **Pressured speech:** Rapid, difficult to interrupt - **Psychomotor agitation:** Increased activity on exam - **Absence of psychotic features:** Noted explicitly ### Key Distinction: Mania vs. Hypomania | Feature | Manic Episode | Hypomanic Episode | |---------|---------------|-------------------| | **Duration** | ≥7 consecutive days | ≥4 consecutive days | | **Functional impairment** | Marked; often requires hospitalization | Minimal to none; no hospitalization | | **Psychotic features** | May occur | Absent by definition | | **Severity** | Severe; noticeable by others | Moderate; may be unnoticed | | **Diagnosis** | Bipolar I | Bipolar II (if with depressive episodes) | **Key Point:** A single manic episode is diagnostic of Bipolar Disorder I, regardless of prior depressive history. The presence of a manic episode (not just hypomanic) defines Bipolar I. ### Why This Is Bipolar I and Not II **High-Yield:** The critical distinction is the **severity and functional impact**. This patient has: - Marked impairment (impulsive spending, multiple risky projects) - Duration of 3 weeks (well beyond the 4-day minimum for hypomania) - Severity sufficient to be noticed by family - No psychotic features (which would still be consistent with mania) Bipolar II requires **hypomanic** episodes (not manic) plus depressive episodes. This patient has a **manic** episode, which by definition = Bipolar I. **Clinical Pearl:** In clinical practice, the distinction between mania and hypomania hinges on **functional impairment and duration**. Hypomania is often described as "mania lite" — the person functions, goes to work, but is noticeably different. Mania causes marked disruption. ### Differential Reasoning - **Cyclothymic disorder:** Requires 2+ years of alternating hypomanic and depressive symptoms; this is a first presentation of a full manic episode. - **Bipolar II with hypomanic episode:** Would require depressive episodes and hypomanic (not manic) episodes. - **MDD with mixed features:** No depressive mood; mood is elevated throughout.