A patient came in the psychiatry OPD with his relatives and complaining knee pain and says that my pain is happening because of aliens are interfering with his thoughts and control him. Which would be the possible diagnosis?

1. A

   Somatic delusion

2. B

   Delusion of control

3. C

   Delusion of grandiosity

4. D

   Delusion of persuasion

Appeared in: NORCET 3 - 2022 (Shift-1)

Explanation

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• The correct diagnosis is delusion of control because the patient explicitly states his thoughts and actions are being controlled by an external force ('aliens').
• This is a specific type of delusion where the central theme is the loss of one's own autonomy to an outside entity.
• Delusions of control (or passivity experiences) are considered a first-rank symptom of schizophrenia, indicating a profound disruption in the sense of self.
• The patient's complaint of knee pain is the content of the delusion, but the type of delusion is defined by the belief of being controlled.

Why Other Options Were Wrong

• Option A: A somatic delusion is a false belief about one's body. While the patient complains of knee pain, the core delusional belief is not about the state of his knee (e.g., 'my knee is rotting') but about why it's happening (external control).
• Option C: A delusion of grandiosity involves an exaggerated sense of one's own importance, power, or identity. The patient's statement does not reflect any belief of being special or powerful.
• Option D: Delusion of 'persuasion' is not a standard psychiatric term; it is likely a misspelling of 'persecution'. A delusion of persecution is the belief that one is being harmed or plotted against. While the patient might feel the aliens' actions are harmful, the primary theme expressed is control, not persecution.

Related Visual

• Visual 1: Flowchart: Differentiating common types of delusions (Control, Persecutory, Grandiose, Somatic) with clear decision points based on the patient's core belief.
• Visual 2: Infographic: Illustrating Schneider's First-Rank Symptoms of Schizophrenia, highlighting Delusion of Control as a key feature.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Identification of specific types of delusions in psychiatric disorders to guide bedside assessment, documentation, and the next nursing action.
• Recognizing the specific type of delusion is crucial for assessing risk. A patient with delusions of control may feel they are not responsible for their actions, which can be a safety concern if they believe they are being commanded to harm themselves or others.
• Therapeutic communication is key. Nurses should not argue about the reality of the delusion but focus on the patient's feelings and redirect them to reality-based topics and activities.
• What if? If the patient had said, 'The aliens put a chip in my knee that is causing the pain,' the diagnosis would still lean towards a delusion of control, but with elements of a somatic delusion, often seen in bizarre delusions where the line between types can blur. However, the theme of external influence remains paramount.

How to Approach the Question

• First, analyze the patient's statement to identify the core belief. Break it down: 'knee pain' (somatic complaint) + 'aliens are interfering with his thoughts and control him' (delusional explanation).
• Focus on the delusional explanation, as this is what the question asks to diagnose.
• The key phrase is 'control him.' This directly points to a specific type of delusion.
• Evaluate each option against this key phrase.
• Option A (Somatic delusion) is about the body itself, not external control.
• Option B (Delusion of control) directly matches the patient's statement.

Concept Tested & Keywords

• Concept Tested: Identification of specific types of delusions in psychiatric disorders.
• Stem keywords: psychiatry OPD, knee pain, aliens, interfering with his thoughts, control him
• Lead-in keywords: possible diagnosis
• Clinical cues: The patient's explanation for his physical symptom (knee pain) is the key to the diagnosis. He attributes it to an external force controlling him, which points away from a simple somatic delusion and towards a delusion of control.

Question ID

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