A 29-year-old woman is hospitalized due to depression and suicidal ideation. She has a 5-year history of chaotic relationships that last only a few short weeks or months. Each relationship has left her feeling abandoned, empty, and extremely upset. During these periods, the patient confesses to shopping and making big purchases on impulse. She says she gets bored easily and moves on to the next adventure. The patient denies any changes in appetite, energy level, or concentration. On examination, multiple linear lacerations of varying phases of healing were noted on her forearms and trunk. Following consultation, she praises physicians to be ‘the best people on the planet’, but when the nurse came in to take her blood, she furiously stated that ‘all nurses are incompetent and cruel’. Which of the following is the most likely diagnosis?

Borderline personality disorder

Histrionic personality disorder

Major depressive disorder (MDD)

A 60-year-old man is brought to the emergency department after a fall. He has been seen by the triage nurse but has not been evaluated by a physician. He is heard yelling down the hallway, requesting to speak to “whoever is in charge.” He refuses to talk to the emergency resident and insists on talking to the attending physician despite being informed that the attending is currently resuscitating a patient who was in a car accident. He says that he deserves better treatment because he has made numerous contributions to the field of medicine. When asked about his work, he mentions that he was a medical device salesman. He is accompanied by his wife, who appears embarrassed. She claims that her husband frequently makes a scene and apologizes for her husband's behavior. On mental status examination, the patient is oriented to person, place, and time. He appears agitated and speaks in short, pressured sentences. There is no disorder of thought process or content. Which of the following is the most likely diagnosis?

Histrionic personality disorder

Obsessive compulsive personality disorder

A 27-year-old man presents to his primary care physician for exposure to toxic materials. The patient states that when he left for work this morning he was certain that he had closed the door to his pantry. However, upon returning home, he saw that the door to his pantry was wide open. The patient is certain that his neighbors have been tampering with his food and potentially poisoned him. He further states that he has known, ever since they have moved in, that they have been trying to break into his house and steal his things. He has tried multiple times to get them evicted from the building to no avail. It is for this reason that he is certain that they are trying to get their revenge upon him. The physician performs a physical exam and tells the patient that he thinks there is nothing to be concerned about, but that he should call him or come into the office if he experiences any symptoms. The patient is outraged at this news and requests a competent doctor who is not colluding with his enemies. He storms out of the office angrily, stating that he deserves the best in medical care, not this. Which of the following is the most likely personality disorder that this patient is suffering from?

Intermittent explosive disorder

Borderline personality disorder

A 12-year-old boy is brought in by his parents as they are concerned about his behavior. He is constantly arguing with his parents and blatantly defying their every request. In school, he is known for being intentionally tardy and for defying his teachers. Upon further questioning of the patient you learn about some of his recent behaviors such as beginning smoking to bother his parents. You also notice that he is disrespectful towards you. You then learn that he has also gotten into weekly fights with his peers at school with no apparent cause. In addition, last week he was seen hitting one of the local neighborhood cats with a baseball bat trying to kill it. The patient lives at home with his two parents in a pre-World War II house that was recently renovated. Physical exam is unremarkable. Laboratory values are as follows: Na: 140 mmol/L K: 4.5 mmol/L Cl: 100 mmol/L Glucose: 80 mg/dL Ca: 10 mmol/L Mg: 3 mEq/L Cr: 0.8 mg/dL BUN: 10 mg/dL Serum lead: < .01 µg/dL Hb: 15 g/dL Hct: 45% MCV: 95 Urine toxicology: negative As the patient leaves the office you notice him stealing all of the candy from the office candy bowl. The patient seems unconcerned about his behavior overall. Which of the following statements is most likely to be true in this patient?

The patient's symptoms could progress to antisocial personality disorder

This patient will likely function normally despite continuing to defy authority figures

Environmental exposures are likely causing this patient's behavior

This patient is suffering from antisocial personality disorder and will likely be incarcerated in adulthood

Strong D2 antagonists are first-line pharmacotherapy

A 23-year-old man presents to the emergency department with a chief complaint of being assaulted on the street. The patient claims that he has been followed by the government for quite some time and that he was assaulted by a government agent but was able to escape. He often hears voices telling him to hide. The patient has an unknown past medical history and admits to smoking marijuana frequently. On physical exam, the patient has no signs of trauma. When interviewing the patient, he is seen conversing with an external party that is not apparent to you. The patient states that he is afraid for his life and that agents are currently pursuing him. What is the best initial response to this patient’s statement?

It sounds like you have been going through some tough experiences lately.

I think you are safe from the agents here.

You have a mental disorder but don’t worry we will help you.

I don’t think any agents are pursuing you.

What medications are you currently taking?

A 31-year-old woman comes to the physician because she thinks that her “right wrist is broken.” She says that she has severe pain and that “the bone is sticking out.” She has not had any trauma to the wrist. Her medical records indicate that she was diagnosed with schizophrenia 2 years ago and treated with olanzapine; she has not filled any prescriptions over the past 4 months. Three weeks ago, she stopped going to work because she “did not feel like getting up” in the morning. Vital signs are within normal limits. Physical examination of the right wrist shows no visible injury; there is no warmth, swelling, or erythema. Range of motion is limited by pain. On mental status examination, she has a flat affect. Her speech is pressured and she frequently changes the topic. She has short- and long-term memory deficits. Attention and concentration are poor. There is no evidence of suicidal ideation. Urine toxicology screening is negative. An x-ray of the wrist shows no abnormalities. Which of the following is the most appropriate response to this patient's concerns?

“I cannot see any injury of your wrist and the physical exam as well as the x-ray don't show any injury. I imagine that feeling as if your wrist was broken may be very uncomfortable. Can you tell me more about what it feels like?”

“It seems as though you are having a schizophrenia relapse. If you don't follow my recommendations and take your medications, you will most likely have further and possibly more severe episodes.”

I understand your concerns; however, your symptoms seem to be psychological in nature. I would be happy to refer you to a mental health professional.

You are clearly distressed. However, your tests do not suggest a physical problem that can be addressed with medications or surgery. I suggest that we meet and evaluate your symptoms on a regular basis.

I can imagine that you are uncomfortable. That certainly looks painful. Let's take care of this injury first and then we should talk about your problems getting up in the morning.

Narcissistic personality disorder for USMLE Step 2 CK: High-Yield Psychiatry Lessons

Overview & Epidemiology - The Grandiose Self

Core: A pervasive pattern of grandiosity, an insatiable need for admiration, and a profound lack of empathy.
Prevalence: Affects up to 6.2% of the population; diagnosed more frequently in men (50-75%).
Onset: Begins by early adulthood, manifesting across various personal and social contexts.
Etiology: Linked to childhood environments of excessive admiration or, conversely, persistent, harsh criticism.

⭐ Patients often present not for NPD itself, but for comorbid depression or anxiety after facing rejection (a "narcissistic injury").

Narcissus gazing at his reflection

Diagnosis (DSM-5) - The 'SPECIAL' Criteria

A pervasive pattern of grandiosity, need for admiration, and lack of empathy, beginning by early adulthood. Requires ≥ 5 of the following criteria:

📌 SPECIAL

Sense of self-importance (e.g., exaggerates achievements, expects to be recognized as superior).
Preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love.
Envious of others or believes that others are envious of them.
Conceited (believes they are "special" and can only be understood by other high-status people).
Interpersonally exploitative (takes advantage of others).
Arrogant, haughty behaviors or attitudes.
Lacks empathy (unwilling to recognize or identify with the feelings of others).

Plus two additional criteria not in the mnemonic:

Requires excessive admiration.
Grandiose sense of entitlement (unreasonable expectations of favorable treatment).

⭐ Exam Favorite: Despite the outward grandiosity, these individuals often have a very fragile self-esteem, making them vulnerable to criticism and prone to depression when faced with failure or rejection.

Differential Diagnosis - Distinguishing Grandiosity

Distinguishing NPD's pervasive grandiosity from other conditions is key. While grandiosity is a hallmark, its nature and context differ significantly.

Bipolar I Disorder (Mania): Grandiosity is episodic, accompanied by elevated mood, hyperactivity, and racing thoughts. In NPD, it's a chronic, stable trait.
Other Cluster B Disorders:
- Antisocial PD: Grandiosity is for exploitation, power, or material gain.
- Histrionic PD: Grandiosity is used to seek attention and appear glamorous.

⭐ The most crucial differentiator is chronicity. Manic grandiosity is a clear departure from the patient's baseline functioning, whereas in NPD, the grandiosity is the baseline.

Management & Complications - Handling the Fragile Ego

Psychotherapy (Mainstay)
- Challenging due to poor insight and extreme sensitivity to criticism (narcissistic vulnerability).
- Goal: Help patients understand and regulate their emotions, and develop more realistic self-esteem.
- Modalities: Psychodynamic psychotherapy, transference-focused therapy (TFP), and dialectical behavior therapy (DBT) are often used.
Pharmacotherapy
- No specific medications for NPD.
- Used to manage comorbid conditions like depression (SSRIs) or mood lability (mood stabilizers).
Complications
- Narcissistic Injury: Severe reactions to perceived slights, leading to rage or profound depression.
- High risk of comorbid Major Depressive Disorder, substance use, and other personality disorders.

⭐ High-Yield: Despite their grandiose exterior, patients with NPD have fragile self-esteem and are at a high risk for suicide, especially following a significant narcissistic injury (e.g., public failure, rejection).

A pervasive pattern of grandiosity, a constant need for admiration, and a striking lack of empathy.

Patients often have a strong sense of entitlement and are interpersonally exploitative.

Despite outward arrogance, they have a fragile self-esteem and are highly sensitive to criticism or defeat.

This vulnerability can lead to "narcissistic rage."

Psychotherapy is the treatment of choice, but progress is difficult due to poor insight.

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