Catatonia across disorders

Catatonia Signs - The Frozen Patient

A distinct psychomotor syndrome involving a marked decrease in environmental reactivity. While often linked to mood and psychotic disorders, it can also stem from medical conditions. Diagnosis requires ≥3 specific signs.

• Stupor/Immobility: Profound lack of movement and response.
• Mutism: Verbally unresponsive.
• Posturing/Catalepsy: Actively holding a posture against gravity.
• Waxy Flexibility: Limb remains in the position it is placed.
• Negativism: Opposition or no response to external stimuli.
• Echolalia/Echopraxia: Mimicking another's speech/movements.

⭐ The Lorazepam Challenge (1-2 mg IV/IM) is a crucial diagnostic and therapeutic tool. A positive response (rapid improvement) helps confirm the diagnosis.

Etiology - More Than Madness

Catatonia stems from diverse medical and psychiatric conditions, challenging the misconception of it being exclusive to schizophrenia. It is most commonly associated with mood disorders.

• Psychiatric:
  • Bipolar Disorder (most frequent cause)
  • Major Depressive Disorder
  • Schizophrenia
• Neurologic:
  • Neuroleptic Malignant Syndrome (NMS)
  • Stroke, tumors, encephalitis
• Medical/Systemic:
  • Metabolic (e.g., uremia, DKA)
  • Infectious (e.g., sepsis)
  • Autoimmune (e.g., lupus)

⭐ While often linked to psychosis in media, catatonia is diagnosed more frequently in patients with bipolar disorder than in those with schizophrenia.

Diagnosis & Workup - The Clinical Detective

• DSM-5 Criteria: Diagnosis requires ≥3 of 12 psychomotor features.
• Diagnostic Flow:

⭐ The Lorazepam Challenge Test is both diagnostic and therapeutic. A positive response (rapid, temporary symptom resolution) strongly supports a catatonia diagnosis over Neuroleptic Malignant Syndrome (NMS).

Management - Breaking the Spell

• 1st Line: Benzodiazepines (e.g., Lorazepam 1-2 mg IV/IM, titrated). Response often seen within minutes.
• 2nd Line/Severe: Electroconvulsive Therapy (ECT) is the most definitive and effective treatment, especially in malignant catatonia.
• ⚠️ AVOID Antipsychotics: Can worsen catatonia and increase risk of Neuroleptic Malignant Syndrome (NMS).

⭐ The "Lorazepam Challenge" is both diagnostic and therapeutic. A dramatic, temporary resolution of symptoms after 1-2 mg IV lorazepam strongly supports the diagnosis.

High-Yield Points - ⚡ Biggest Takeaways

• Catatonia is a psychomotor syndrome seen across psychiatric (mood, psychotic) and medical conditions.
• Diagnosis requires ≥3 of 12 symptoms like mutism, stupor, and waxy flexibility.
• The lorazepam challenge test is both diagnostic and therapeutic, often causing rapid improvement.
• First-line treatment is benzodiazepines; ECT is the most definitive treatment, especially for malignant catatonia.
• Always differentiate from Neuroleptic Malignant Syndrome (NMS), which presents similarly.
• Malignant catatonia is a life-threatening emergency with fever and autonomic instability.