A 28-year-old man with schizophrenia presents with prominent auditory hallucinations and disorganized speech. Which of the following is the most common positive symptom in schizophrenia?

Question

Accepted Answer

B. Auditory hallucinations. ## Most Common Positive Symptom in Schizophrenia

**Key Point:** Auditory hallucinations are the most frequent positive symptom in schizophrenia, occurring in 60–80% of patients with psychotic episodes.

### Prevalence of Hallucinations by Modality

| Hallucination Type | Frequency in Schizophrenia | Clinical Characteristics |
|---|---|---|
| **Auditory** | 60–80% | Most common; often voices commenting or conversing |
| **Visual** | 20–40% | Less common; may occur with substance use or organic causes |
| **Tactile** | 5–15% | Rare in primary schizophrenia; suggests organic pathology |
| **Olfactory** | <5% | Uncommon; may indicate temporal lobe involvement |

### Characteristics of Auditory Hallucinations in Schizophrenia

**High-Yield:** Auditory hallucinations in schizophrenia typically manifest as:
- **Second-person voices** (addressing the patient directly)
- **Third-person voices** (discussing the patient; pathognomonic)
- **Command hallucinations** (instructing the patient to perform actions)
- **Running commentary** (narrating the patient's actions)

**Clinical Pearl:** The presence of third-person voices or running commentary is highly suggestive of schizophrenia and is included in Schneider's first-rank symptoms, which have high specificity for the diagnosis.

**Warning:** Visual hallucinations are more common in organic psychoses (delirium, substance intoxication, neurological disorders) and should prompt investigation for medical causes before attributing them solely to schizophrenia.

Answer

A. Visual hallucinations

Answer

C. Tactile hallucinations

Answer

D. Olfactory hallucinations

A 28-year-old man with schizophrenia presents with prominent auditory hallucinations and disorganized speech. Which of the following is the most common positive symptom in schizophrenia?

Explanation

Most Common Positive Symptom in Schizophrenia

Prevalence of Hallucinations by Modality

Characteristics of Auditory Hallucinations in Schizophrenia

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Hallucination Type	Frequency in Schizophrenia	Clinical Characteristics
Auditory	60–80%	Most common; often voices commenting or conversing
Visual	20–40%	Less common; may occur with substance use or organic causes
Tactile	5–15%	Rare in primary schizophrenia; suggests organic pathology
Olfactory	<5%	Uncommon; may indicate temporal lobe involvement