**Question:** A 52-year-old man comes to the physician with the chief complaint of feeling depressed for the past 2 months. He notes that he is not sleeping well, has lost 5 kg in the last 6 weeks, and is experiencing anergia and anhedonia. In addition, in the past 4 weeks he has begun to hear the voice of his dead father telling him that he is a failure and he has begun worrying that his organs are rotting away. Which of the following statements is true?

A. The patient has major depressive disorder
B. The patient has psychotic depression
C. The patient has bipolar disorder
D. The patient has post-traumatic stress disorder

**Correct Answer:** B. The patient has psychotic depression

**Core Concept:**
Depression is a mood disorder characterized by persistent feelings of sadness, hopelessness, and low self-esteem. Psychotic depression, also known as major depressive disorder with psychotic features, occurs when an individual with depression experiences delusions and/or hallucinations, which are the core symptoms in psychotic disorders. Delusions are fixed, false beliefs that are not based on reality and cannot be easily corrected by evidence. Hallucinations are the perception of sensory experiences without an external stimulus.

**Why the Correct Answer is Right:**
In this case, the patient presents with symptoms consistent with psychotic depression, also known as major depressive disorder with psychotic features. This includes:

1. **Major depressive episode**: The patient has been feeling depressed for the past 2 months, which is consistent with the duration criteria for major depressive disorder.
2. **Psychotic features**: The patient is experiencing delusions ("hearing the voice of his dead father") and hallucinations ("worrying that his organs are rotting away"). These are core symptoms of psychotic disorders.
3. **Delusions of reference**: The patient's distressing belief that others are talking about him or her due to his hallucinations ("hearing the voice of his dead father") is a hallmark feature of psychotic disorders.

**Why Other Options are Incorrect:**
A. Major depressive disorder is not accompanied by psychotic features, such as hallucinations and delusions.
C. Bipolar disorder is a different psychiatric disorder characterized by episodes of mania and depression, not just depression itself.
D. Post-traumatic stress disorder (PTSD) is a psychiatric disorder triggered by a traumatic event and is not characterized by hallucinations and delusions.

**Clinical Pearl:**
Psychotic features in a patient with depression are indicative of a major depressive disorder with psychotic features, also known as psychotic depression. This type of depression is a separate clinical entity from major depressive disorder without psychotic features.

**Why Other Options are Incorrect:**
A. Major depressive disorder without psychotic features is characterized by symptoms of depression without hallucinations and delusions.
C. Bipolar disorder, also known as manic-depressive disorder, involves episodes of mania and depression. It is characterized by psychotic features in a different context.
D. Post-traumatic stress disorder (PTSD) is