Chapter review

Fitzgerald PMHNP board review. ch08. Mood Disorders. This is drive 3 of 8. When I say Pause. Answer. wait, then I will give the answer. New section. Bipolar and related disorders: criteria, mixed features, rapid cycling, mania vs hypomania. Topic. Manic Episode Criteria. Bottom Line Summary. * **Bipolar I disorder** requires at least 1 manic episode lasting **1 week** (7 consecutive days) or any duration if hospitalization is required. * **Bipolar II disorder** requires at least 1 major depressive episode (lasting **2 weeks**) and at least 1 hypomanic episode (lasting **4 consecutive days**), with no history of mania. * **DIG FAST** diagnostic criteria require at least **3 symptoms** (or **4 symptoms** if mood is only irritable) out of 7: Distractibility, Indiscretion/Impulsivity, Grandiosity, Flight of ideas, Activity increase, Sleep deficit, and Talkativeness. * **Mania vs. Hypomania**: **Mania** causes marked occupational or social impairment, may require **hospitalization**, or includes **psychotic features**. **Hypomania** causes a distinct, observable change in functioning for at least **4 days** without marked impairment, hospitalization, or psychosis. * **Antidepressant rule**: Antidepressant-induced mania that persists at a full syndromal level beyond the physiological effect of the drug meets full criteria for **bipolar I disorder**. * **Mixed features**: Defined as meeting full manic or hypomanic criteria while simultaneously experiencing at least **3 depressive symptoms**. * **Rapid cycling**: Defined as **4 or more** mood episodes (depressive, manic, or hypomanic) within a **12-month** period. * **First-line pharmacotherapy**: Acute mania treatment includes **lithium**, **valproate** (divalproex), **carbamazepine**, or second-generation antipsychotics such as **olanzapine**, **quetiapine**, **risperidone**, or **aripiprazole**. **Lithium** is preferred for classic euphoric mania, while **valproate** is preferred for irritable or mixed mania. High-Yield Clinical Teaching: Manic Episode Criteria. Diagnostic Framework and Timelines. A **manic episode** is defined under DSM-5-TR as a distinct period of abnormally and persistently elevated, expansive, or irritable mood, combined with a persistent increase in goal-directed activity or energy [1, 2]. This disturbance must last at least **1 week** and be present most of the day, nearly every day, unless **hospitalization** is necessary, in which case any duration qualifies . The DIG FAST Symptom Cluster. To establish a diagnosis, the patient must exhibit at least **3 symptoms** from the **DIG FAST** cluster if the mood is elevated or expansive . If the mood is exclusively irritable, at least **4 symptoms** are required : * **Distractibility**: Attention is easily drawn to unimportant or irrelevant external stimuli . * **Indiscretion**: Excessive involvement in activities with a high potential for painful consequences, such as buying sprees, financial recklessness, or sexual indiscretions . * **Grandiosity**: Inflated self-esteem or delusional grandiosity . * **Flight of ideas**: Subjective experience that thoughts are racing or rapid, disorganized speech . * **Activity increase**: Increased goal-directed activity at work, school, or socially, or psychomotor agitation . * **Sleep deficit**: Decreased need for sleep, such as feeling fully rested after only 2 to 3 hours of sleep . * **Talkativeness**: Pressured speech or urgent need to keep talking . Safety Alert. **Safety alert**: Acute mania presents high risks for severe financial ruin, legal complications, physical exhaustion, and accidental trauma due to extreme impulsivity and grandiosity . If a patient displays **psychotic features**, severe psychomotor agitation, or active risk to self or others, immediate inpatient **hospitalization** is required for physical safety before initiating outpatient psychotherapy . Board Trap. **Board trap**: Test writers often present a patient who develops manic symptoms after starting an **antidepressant** or steroid . Do not automatically classify this as a simple drug side effect . If the manic episode persists at a full syndromal level beyond the expected physiological effect of the medication, the correct diagnostic label is **bipolar I disorder** . Another trap is assuming patients will spontaneously report past elevated mood . Patients rarely volunteer hypomanic or manic history because they perceive it as high productivity or wellness . Always screen actively using tools like the Mood Disorder Questionnaire (**MDQ**) . First-Line Interventions. **First-line**: First-line monotherapy for acute euphoric mania consists of **lithium** or **valproate**, or a second-generation antipsychotic such as **olanzapine**, **quetiapine**, or **risperidone** . For severe acute agitation, a second-generation antipsychotic provides a faster onset of control than a traditional mood stabilizer . Short-term adjunctive **benzodiazepines** like **lorazepam** or **clonazepam** may be added for acute insomnia and psychomotor agitation . Antidepressant monotherapy must be tapered and discontinued . Comparing Mania, Hypomania, and Cyclothymia. Comparing these mood states relies on duration, severity, and functional impact rather than symptom type alone: * **Mania**: Requires at least **1 week** of symptoms . Causes marked impairment in social or occupational functioning, may require **hospitalization**, or may feature **psychotic features** . Confirms a diagnosis of **bipolar I disorder** . * **Hypomania**: Requires at least **4 consecutive days** of symptoms . Causes an unequivocal change in functioning that is noticeable to others, but does **not** cause marked impairment, does **not** require **hospitalization**, and **never** includes **psychotic features** . Combined with at least one major depressive episode, it establishes **bipolar II disorder** . * **Cyclothymic Disorder**: Requires at least **2 years** in adults (**1 year** in children) of fluctuating hypomanic and depressive symptoms that occur for at least half the time and never meet full criteria for a major depressive, manic, or hypomanic episode . Specifiers: Mixed Features and Rapid Cycling. * **Mixed Features**: This specifier is applied when full criteria for a manic or hypomanic episode are met, and at least **3 depressive symptoms** (such as depressed mood, anhedonia, psychomotor retardation, fatigue, or feelings of worthlessness) are present simultaneously . **Valproate** or an **SGA** is preferred over **lithium** for mixed mania . * **Rapid Cycling**: Defined as experiencing **4 or more** distinct mood episodes (major depressive, manic, or hypomanic) within a **12-month** period . Rapid cycling requires evaluating for underlying thyroid dysfunction (**TSH**) or substance use, and often responds better to **valproate** or **carbamazepine** than **lithium**. Board-Style Sample Test Questions. Question 1. Jeremy, a 36-year-old married attorney, is referred by his primary care provider for a consultation regarding his depression . He relates problems with what he calls minor depression and mood swings for at least 15 years . He denies ever having any suicidal ideation, psychiatric hospitalization, or legal difficulty . On the Mood Disorder Questionnaire, he checks four items positive and three as possibly positive . Which disorder most likely fits his symptoms ? A) Bipolar I disorder B) Bipolar II disorder C) Cyclothymic disorder D) Dysthymia Pause. Answer: C . Why correct: Cyclothymic disorder is characterized by a chronic, fluctuating mood disturbance lasting at least two years in adults with numerous periods of hypomanic symptoms and periods of depressive symptoms that do not meet full criteria for a major depressive or manic episode . Why the other choices are wrong: * **A**: Bipolar I disorder requires at least one full manic episode lasting at least seven days or requiring hospitalization, which is not present in his history . * **B**: Bipolar II disorder requires at least one full major depressive episode and at least one hypomanic episode, whereas this patient has only low-grade, sub-syndromal fluctuations . * **D**: Dysthymia, or persistent depressive disorder, involves chronic low-grade depression without hypomanic or manic symptom spikes [3, 4]. Question 2. The patient with bipolar disorder who is most likely to be misdiagnosed as having unipolar depression most likely has which diagnosis ? A) Dysthymia B) Bipolar II disorder C) Bipolar I disorder D) Cyclothymia Pause. Answer: B . Why correct: Patients with Bipolar II disorder present for clinical care during major depressive episodes and rarely report past hypomania because hypomanic episodes are experienced as periods of high energy, efficiency, and positive mood without social crisis . Why the other choices are wrong: * **A**: Dysthymia is a chronic unipolar depressive condition rather than a bipolar spectrum disorder misdiagnosed as depression [3, 4]. * **C**: Bipolar I disorder involves overt manic episodes that cause severe occupational disruption, psychosis, or hospitalization, making it easily distinguishable from unipolar depression . * **D**: Cyclothymia involves mild chronic mood swings that do not meet full criteria for major depressive episodes, so patients rarely present with full major unipolar depression . Question 3. Patients with bipolar disorder are more likely to attempt suicide during manic episodes . A) True B) False C) Depends on age D) Depends on gender Pause. Answer: B . Why correct: Suicide attempts in bipolar disorder occur predominantly during major depressive episodes or mixed states, or when emerging from depression as energy returns, rather than during pure euphoric manic episodes . Why the other choices are wrong: * **A**: Pure manic episodes feature grandiosity and high drive, whereas active suicidal intent and despair peak during depressive and mixed phases . * **C**: Age alters baseline suicide rates but does not change the fact that depressive and mixed states carry higher immediate suicide risk than pure mania. * **D**: Gender affects suicide completion methods and attempt frequency, but state-dependent suicide risk remains concentrated in depressive and mixed phases. Question 4. Patients rarely volunteer information about manic or hypomanic symptoms during a clinical interview . A) True B) False C) Only in Bipolar I D) Only in pediatric cases Pause. Answer: A . Why correct: Patients view hypomanic or manic phases as periods of optimal functioning, high creativity, and well-being, or they lack insight into their symptom disruption, leading them to seek help only for depression . Why the other choices are wrong: * **B**: Assuming patients will spontaneously report past hypomania leads to diagnostic failure and unsafe unipolar antidepressant prescribing . * **C**: Under-reporting occurs in both Bipolar I and Bipolar II, though it is especially common in Bipolar II where hypomania causes no social crises . * **D**: Failure to volunteer hypomanic history occurs across all age groups, including young adults, middle-aged adults, and older adults. Question 5. Patients usually exhibit limited insight during an acute manic phase . A) True B) False C) Only when psychotic D) Only during rapid cycling Pause. Answer: A . Why correct: Acute mania impairs self-monitoring, reflection, and executive judgment, causing patients to believe their grandiose plans, sleep deprivation, and risky behaviors are completely justified and normal . Why the other choices are wrong: * **B**: Believing manic patients have intact insight leads clinicians to expect voluntary treatment adherence, which is frequently absent during acute episodes . * **C**: Impaired insight is a core feature of acute mania even in the absence of overt psychotic delusions or hallucinations . * **D**: Rapid cycling refers to episode frequency per year (4 or more episodes) and does not dictate the presence of impaired insight during an active episode . 💡 *Want to test your recall on Bipolar I vs Bipolar II prescribing algorithms, or explore lithium laboratory monitoring parameters next?* Next. Topic. Hypomanic Episode Criteria. Bottom Line. * **Hypomanic episode criteria** require an elevated, expansive, or irritable mood along with persistently increased energy or goal-directed activity lasting at least **4 consecutive days**. * Diagnosis requires **3 or more DIG FAST symptoms** (4 symptoms if the mood is exclusively irritable), representing an unequivocal change in functioning that is observable by others. * A hypomanic episode causes **no marked impairment** in social or occupational functioning, requires **no hospitalization**, and features **no psychotic symptoms**. * If hospitalization is required or if psychotic features are present, the episode is automatically classified as a **manic episode**, establishing a diagnosis of **Bipolar I disorder**. * **Bipolar II disorder** requires at least 1 hypomanic episode and at least 1 major depressive episode. It is the most common bipolar subtype misdiagnosed as unipolar major depressive disorder. * **Rapid cycling** is defined as **4 or more mood episodes** (depressive, manic, or hypomanic) within a 12-month period. * **First-line treatment** for acute hypomania or mania includes **lithium**, **valproate**, or **second-generation antipsychotics**, while **lamotrigine** or **lithium** is used for maintenance and bipolar depression. High-Yield Concept Map: Hypomanic Episode Criteria and Bipolar Spectrum. Hypomanic Episode Criteria. * **Definition:** A distinct period of abnormally elevated, expansive, or irritable mood with persistently increased energy or goal-directed activity. * **Diagnostic Timeline:** Must persist for at least **4 consecutive days** and be present for most of the day, nearly every day. * **Symptom Threshold:** Requires at least **3 DIG FAST symptoms** (4 symptoms if mood is only irritable). * **The DIG FAST Mnemonic:** * **D**istractibility: Attention is easily drawn to unimportant or irrelevant external stimuli. * **I**ndiscretion: Over-involvement in activities with high potential for painful consequences (such as major spending sprees, buying \$1000 of prairie grass, or sexual indiscretions). * **G**randiosity: Inflated self-esteem or grandiosity without overt psychotic delusions. * **F**light of ideas: Subjective experience that thoughts are racing, or rapid flight of ideas. * **A**ctivity increase: Increased goal-directed activity at work, school, or socially, or psychomotor agitation. * **S**leep deficit: Decreased need for sleep, such as feeling fully rested after only 2 to 3 hours of sleep. * **T**alkativeness: More talkative than usual or feeling intense pressure to keep talking. * **Level of Functioning:** The episode is associated with an unequivocal change in functioning that is uncharacteristic of the individual when asymptomatic, and this change is observable by family or colleagues. * **Key Distinguishing Boundaries:** * It is not severe enough to cause marked impairment in social or occupational functioning. * It does not require psychiatric hospitalization. * It contains no psychotic features such as delusions or hallucinations. Signposts and Board Pearls. * **Safety alert:** If a patient with elevated mood exhibits delusions, hallucinations, or requires inpatient hospitalization for physical safety, the episode is automatically manic, not hypomanic. This immediately establishes a diagnosis of **Bipolar I disorder**. * **Board trap:** Patients in a hypomanic state rarely seek psychiatric treatment because they feel energetic, highly productive, and confident. They typically present for treatment only during severe depressive phases. Consequently, **Bipolar II disorder** is frequently misdiagnosed as unipolar major depressive disorder. * **Board trap:** Initiating antidepressant monotherapy in a patient with unrecognized Bipolar II disorder can precipitate a manic switch, rapid cycling, or severe agitation. Always screen for past hypomanic episodes using tools like the Mood Disorder Questionnaire before prescribing antidepressants. * **First-line:** For acute hypomania or mania, **first-line monotherapy** includes **lithium**, **valproate**, **carbamazepine**, or a **second-generation antipsychotic** such as **quetiapine**, **olanzapine**, **risperidone**, or **aripiprazole**. * **First-line:** For bipolar depression, **first-line** choices include **lithium**, **lamotrigine**, **quetiapine** (300 mg daily), **lurasidone**, or **lumateperone**. Antidepressant monotherapy is not recommended. Compare and Distinguish: Bipolar Spectrum Differentials. Hypomanic Episode vs. Manic Episode. * **Think:** Hypomania is at least 4 days without marked impairment, hospitalization, or psychosis. Mania is at least 1 week (or any duration if hospitalized) with marked impairment, psychosis, or hospitalization. * **Priority:** Assess physical safety, risk of harm, and need for inpatient admission. * **Boards are testing:** Hospitalization or psychotic symptoms automatically equal mania, regardless of symptom duration. Bipolar I Disorder vs. Bipolar II Disorder. * **Think:** Bipolar I requires at least 1 manic episode (major depressive episodes are common but technically not required for diagnosis). Bipolar II requires at least 1 hypomanic episode AND at least 1 major depressive episode. * **Priority:** Differentiate full mania from hypomania to select correct maintenance pharmacotherapy and assess safety. * **Boards are testing:** Bipolar II is the subtype most often misdiagnosed as unipolar depression because patients only seek help when depressed. Cyclothymic Disorder vs. Bipolar II Disorder. * **Think:** Cyclothymia is chronic mood instability lasting at least 2 years in adults (1 year in children) with hypomanic and depressive symptoms that never meet full criteria for a hypomanic or major depressive episode. * **Priority:** Recognize long-standing subclinical mood instability that has not caused severe occupational disruption or legal trouble. * **Boards are testing:** Cyclothymia involves subclinical fluctuations for at least 2 years without ever meeting full MDD or hypomania thresholds. Psychopharmacology and Laboratory Safety Pearls. * **Lithium:** * **Indication:** Preferred for classic euphoric, grandiose mania and maintenance. Has independent anti-suicide evidence. * **Therapeutic Range:** **0.8 to 1.2 mEq/L** for acute mania; **0.6 to 1.0 mEq/L** for maintenance. * **Baseline Workup:** BUN, serum creatinine, eGFR, TSH, serum electrolytes, CBC, ECG (if over age 50), and pregnancy test. * **Toxicity Warning:** Toxicity begins near **1.5 mEq/L** with tremor, ataxia, confusion, nausea, and diarrhea. Dehydration, low sodium, NSAIDs, ACE inhibitors, and thiazide diuretics elevate lithium levels. Prednisone does not alter lithium levels. * **Valproate (Depakote):** * **Indication:** Preferred for dysphoric or irritable mania, mixed features, comorbid substance use, or traumatic brain injury. * **Therapeutic Level:** **50 to 120 mcg/mL**. * **Monitoring:** LFTs, CBC with platelets, and pregnancy test. Discontinue if transaminases (AST/ALT) exceed 2 to 3 times the upper limit of normal. * **Lamotrigine (Lamictal):** * **Indication:** First-line for bipolar depression and prevention of depressive relapses. * **Safety Alert:** Black box warning for Stevens-Johnson syndrome rash. Must start at 25 mg daily for 2 weeks, then 50 mg daily for 2 weeks, then 100 mg, then 200 mg. No routine baseline lab monitoring is required. Fitzgerald Sample Test Questions. Question 1. Jeremy, a 36-year-old married attorney, was referred by his primary care provider for a consultation regarding his depression. He relates problems with what he would call minor depression and mood swings for at least 15 years. He denies ever having any suicidal ideation, hospitalization, or legal difficulty. On the Mood Disorder Questionnaire, he checks four items positive and three as possibly positive. Which disorder most likely fits his symptoms? A. Bipolar I disorder B. Bipolar II disorder C. Cyclothymic disorder D. Dysthymia Pause. Answer: C Why it is correct: Cyclothymic disorder is characterized by chronic mood instability lasting at least 2 years in adults (here present for 15 years) involving periods of hypomanic symptoms and low-grade depressive symptoms that do not meet full DSM criteria for a major depressive episode or a hypomanic episode. Jeremy has chronic, low-grade mood fluctuations without severe functional disruption, legal issues, or hospitalizations. Why the other choices are wrong: * A. Bipolar I disorder requires at least one full manic episode, which typically involves marked impairment, legal difficulty, or hospitalization. * B. Bipolar II disorder requires at least one full major depressive episode and at least one full hypomanic episode lasting at least 4 consecutive days. * D. Dysthymia (persistent depressive disorder) involves chronic low-grade depressive symptoms without any hypomanic or elevated mood periods. Question 2. The patient with bipolar disorder who is most likely to be misdiagnosed as having unipolar depression most likely has: A. Dysthymia B. Bipolar II disorder C. Bipolar I disorder D. Cyclothymic disorder Pause. Answer: B Why it is correct: Patients with Bipolar II disorder experience hypomanic episodes that feel productive and pleasant, so they rarely report them as clinical problems. They present to healthcare providers only during distressing major depressive episodes. As a result, clinicians frequently mistake Bipolar II for unipolar major depressive disorder. Why the other choices are wrong: * A. Dysthymia is a unipolar depressive disorder rather than a bipolar spectrum condition. * C. Bipolar I disorder features overt manic episodes with severe functional disruption or psychosis that are clearly distinguishable from unipolar depression. * D. Cyclothymic disorder involves mild, chronic mood swings that do not meet full criteria for major depressive episodes, making unipolar MDD an unlikely misdiagnosis. Next. Topic. Mnemonic: DIG FAST. Bottom Line. - **Bipolar I disorder** requires at least 1 manic episode lasting at least 1 week or requiring hospitalization, characterized by abnormally elevated, expansive, or irritable mood and increased goal-directed energy. - **Bipolar II disorder** requires at least 1 major depressive episode lasting 2 weeks and at least 1 hypomanic episode lasting 4 consecutive days, with no history of full mania. - The **DIG FAST** mnemonic identifies the 7 cardinal manic and hypomanic symptoms: **Distractibility**, **Indiscretion**, **Grandiosity**, **Flight of ideas**, **Activity increase**, **Sleep deficit**, and **Talkativeness**. - Diagnostic criteria require at least 3 **DIG FAST** symptoms if mood is elevated or expansive, or at least 4 symptoms if mood is solely irritable. - **Cyclothymic disorder** involves chronic, fluctuating hypomanic and depressive symptoms for at least 2 years in adults (1 year in children) without meeting full criteria for a major depressive or manic episode. - **Rapid cycling** is defined by 4 or more distinct major mood episodes within a 12-month period. - **First-line** acute treatment for mania includes **lithium**, **valproate**, **carbamazepine**, or a second-generation antipsychotic like **olanzapine**, **quetiapine**, or **risperidone**. High-Yield Concept Review: DIG FAST and Bipolar Spectrum. Diagnostic Criteria and DIG FAST Breakdown. The **DIG FAST** mnemonic encapsulates the core criteria for manic and hypomanic episodes [1, 2]: - **Distractibility**: Attention is easily drawn to irrelevant outside stimuli source 3. - **Indiscretion**: Over-involvement in activities with high potential for painful consequences, such as reckless spending, foolish investments, or sexual indiscretions [3, 4]. - **Grandiosity**: Inflated self-esteem or delusional grandiosity, such as believing one possesses special powers or a divine mission [3, 5]. - **Flight of ideas**: Subjective feeling that thoughts are racing, or observed rapid shifting from topic to topic source 3. - **Activity increase**: Increased goal-directed activity at work, school, or socially, or psychomotor agitation source 6. - **Sleep deficit**: Decreased need for sleep, where the patient feels rested after only 2 to 3 hours [6, 7]. - **Talkativeness**: Pressure to keep talking or rapid speech [6, 7]. Comparing Mania vs Hypomania. - **Manic episode**: Mood must be abnormally elevated, expansive, or irritable for at least 1 week [2, 8]. Requires 3 **DIG FAST** symptoms, or 4 if mood is only irritable [2, 8]. Causes marked impairment in social or occupational functioning, requires hospitalization, or features psychotic symptoms [5, 9]. - **Hypomanic episode**: Mood must be elevated, expansive, or irritable for at least 4 consecutive days source 2. Requires 3 **DIG FAST** symptoms, or 4 if mood is only irritable [2, 10]. Causes an unequivocal change in functioning noticed by others, but does not cause marked social or occupational impairment, does not require hospitalization, and lacks psychotic features [11, 12]. Bipolar Spectrum Subtypes. - **Bipolar I disorder**: Defined by at least 1 lifetime manic or mixed episode [10, 13]. Major depressive episodes occur in 90% of individuals but are not strictly required for formal diagnosis [10, 13]. - **Bipolar II disorder**: Defined by at least 1 major depressive episode AND at least 1 hypomanic episode source 14. Never includes a full manic episode source 14. - **Cyclothymic disorder**: Present for at least 2 years in adults (1 year in children/adolescents) with numerous periods of hypomanic and depressive symptoms that never meet full diagnostic thresholds [15, 16]. Symptoms are present for at least half the time, with no symptom-free interval exceeding 2 months [15, 17]. - **Rapid cycling specifier**: Characterized by 4 or more mood episodes (depressive, manic, or hypomanic) within a 12-month period [18, 19]. - **With mixed features specifier**: Full criteria met for mania or hypomania while simultaneously experiencing at least 3 concurrent depressive symptoms, or vice versa source 19. Key Signposts. - **First-line**: For classic euphoric mania, **lithium** is first-line and reduces suicide risk [20, 21]. For acute agitation or aggressive mania, second-generation antipsychotics like **olanzapine**, **quetiapine**, or **risperidone** act faster than mood stabilizers [20, 22]. For dysphoric or irritable mania, mixed features, or rapid cycling, **valproate** is preferred over **lithium** [20, 23]. - **Safety alert**: Antidepressant monotherapy with **SSRIs** or **SNRIs** in patients with bipolar disorder can precipitate acute mania, hypomania, or rapid cycling [9, 24-26]. Always taper and discontinue antidepressants during manic phases source 25. - **Board trap**: Misdiagnosing **Bipolar II disorder** as unipolar **major depressive disorder** [27-29]. Patients rarely complain about hypomania because increased energy feels beneficial [27, 29]. Always obtain collateral history and screen for past periods of reduced sleep and hyperactivity before prescribing antidepressants [29-31]. Sample Exam Questions. Question 1. Jeremy, a 36-year-old married attorney, was referred by his primary care provider for a consultation regarding his depression source 32. He relates problems with what he would call minor depression and mood swings for at least 15 years [32, 33]. He denies ever having any suicidal ideation, hospitalization, or legal difficulty source 33. On the Mood Disorder Questionnaire, he checks four items positive and three as possibly positive source 16. Which disorder most likely fits his symptoms source 16? - A. **Bipolar I disorder** - B. **Bipolar II disorder** - C. **Cyclothymic disorder** - D. **Dysthymia** Pause. Answer: C source 16 Keyed letter: C source 16 Why it is correct: **Cyclothymic disorder** is characterized by a chronic, fluctuating mood disturbance lasting at least 2 years in adults, involving numerous hypomanic and depressive periods that do not meet full criteria for manic, hypomanic, or major depressive episodes, without severe occupational destruction or hospitalization [15, 16]. Why the other choices are wrong: - A. **Bipolar I disorder** requires at least 1 full manic episode, which typically causes marked social or occupational impairment or requires emergency hospitalization [5, 34]. - B. **Bipolar II disorder** requires at least 1 full major depressive episode and at least 1 distinct hypomanic episode [14, 34]. - D. **Dysthymia** (persistent depressive disorder) involves chronic low-grade depression without hypomanic or manic mood swings [34, 35]. Question 2. The patient with bipolar disorder who is most likely to be misdiagnosed as having unipolar depression most likely has: - A. **Dysthymia** - B. **Bipolar II disorder** - C. **Bipolar I disorder** - D. **Cyclothymia** Pause. Answer: B [28, 29] Keyed letter: B source 29 Why it is correct: Patients with **Bipolar II disorder** seek clinical help during painful major depressive episodes and rarely report past hypomanic phases because hypomania is experienced as productive and enjoyable, leading providers to misdiagnose unipolar depression [27, 29]. Why the other choices are wrong: - A. **Dysthymia** is a primary unipolar depressive condition without any history of hypomania or mania [29, 35]. - C. **Bipolar I disorder** involves overt manic episodes with severe dysfunction or psychosis that are readily recognized and unlikely to be mistaken for unipolar depression [5, 36]. - D. **Cyclothymia** consists of chronic low-level mood swings that do not meet full criteria for major depressive episodes [15, 36]. Active Recall Checkpoints. 1. What is the minimum duration required for a manic episode versus a hypomanic episode? 2. How many **DIG FAST** symptoms are required if the patient's mood is only irritable? 3. Which mood stabilizer is preferred for classic euphoric mania, and which is preferred for dysphoric or mixed mania? 4. What criterion defines the rapid cycling specifier in bipolar disorder? 5. Why is antidepressant monotherapy dangerous in an unrecognized bipolar patient? Next. End of this drive.