A 28-year-old woman from Delhi presents to the psychiatry outpatient department with her husband. She reports a 3-week episode of elevated mood, decreased need for sleep (sleeping only 2 hours per night but feeling fully rested), racing thoughts, and increased goal-directed activity. She has started multiple business ventures simultaneously and has spent ₹5 lakhs on jewelry despite financial constraints. Her husband mentions she has had two similar episodes in the past 18 months, each lasting 1–2 weeks, followed by periods of normal mood lasting 2–3 months. There is no history of depressive episodes. Mental status examination reveals pressured speech, flight of ideas, and grandiose ideation. What is the most likely diagnosis?

Question

Accepted Answer

B. Bipolar Disorder I, current episode manic. ## Diagnosis: Bipolar Disorder I, Current Episode Manic

### Key Diagnostic Criteria Met

**Key Point:** Bipolar Disorder I requires at least one manic episode (lasting ≥7 days) with marked functional impairment and/or hospitalization. Hypomanic episodes alone do NOT meet criteria for BD I.

This patient meets full criteria for a **manic episode**:
- **Duration:** 3 weeks (exceeds 7-day minimum)
- **Core symptoms:** Elevated mood, decreased need for sleep, racing thoughts, increased goal-directed activity (3 of 3 cardinal features present)
- **Functional impairment:** Reckless spending (₹5 lakhs), multiple simultaneous business ventures
- **Grandiosity:** Present on mental status examination

### Bipolar I vs. Bipolar II Differentiation

| Feature | Bipolar I | Bipolar II |
|---------|-----------|----------|
| **Manic episode** | Required (≥7 days, severe) | Absent |
| **Hypomanic episode** | May occur | Required (≥4 days, mild–moderate) |
| **Depressive episode** | May occur | Required (≥14 days) |
| **Functional impairment** | Marked (often hospitalization) | Minimal to none |
| **Psychotic features** | May occur during mania | Absent |

**High-Yield:** The **presence of a full manic episode** (not just hypomanic) is the defining criterion for Bipolar I. This patient's 3-week episode with marked functional impairment and grandiosity is unambiguously manic, not hypomanic.

### Why Not Cyclothymic Disorder?

Cyclothymic Disorder requires:
- Multiple hypomanic episodes (never reaching full mania)
- Multiple depressive episodes (never reaching full major depression)
- Symptoms for ≥2 years with no symptom-free intervals >2 months

This patient has experienced **full manic episodes** with severe functional impairment, which excludes cyclothymic disorder by definition.

### Clinical Pearl

**Clinical Pearl:** The key distinguishing feature between Bipolar I and Bipolar II is the **severity and duration of the elevated mood episode**. A manic episode is a psychiatric emergency; a hypomanic episode is not. This patient's reckless spending and impulsive business ventures indicate loss of judgment typical of mania, not the preserved insight often seen in hypomania.

### Mnemonic: DIG FAST (Manic Symptoms)

**Mnemonic:** DIG FAST — **D**istractibility, **I**nflated self-esteem, **G**randiosity, **F**light of ideas, **A**ctivity increase, **S**leep decrease, **T**alkativeness (pressured speech)

This patient exhibits: Grandiosity, Flight of ideas, Activity increase, Sleep decrease, and Talkativeness — a full constellation of manic features.

Answer

A. Bipolar Disorder II, current episode hypomanic

Answer

C. Cyclothymic Disorder

Answer

D. Substance-induced mood disorder

Explanation

Diagnosis: Bipolar Disorder I, Current Episode Manic

Key Diagnostic Criteria Met

Bipolar I vs. Bipolar II Differentiation

Why Not Cyclothymic Disorder?

Clinical Pearl

Mnemonic: DIG FAST (Manic Symptoms)

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Feature	Bipolar I	Bipolar II
Manic episode	Required (≥7 days, severe)	Absent
Hypomanic episode	May occur	Required (≥4 days, mild–moderate)
Depressive episode	May occur	Required (≥14 days)
Functional impairment	Marked (often hospitalization)	Minimal to none
Psychotic features	May occur during mania	Absent