A 32-year-old woman from Mumbai is brought to the emergency department by her family with acute agitation, mutism, and waxy flexibility of her limbs. Over the past 3 weeks, she has become increasingly withdrawn, stopped speaking, and refused food. Her family reports she had been suspicious of neighbours for 2 months prior. On examination, she maintains bizarre postures and does not respond to commands, though her eyes follow the examiner. There is no fever, and metabolic panel is normal. What is the most likely presentation of her underlying psychotic disorder?

Explanation

## Catatonic Schizophrenia (Schizophrenia with Catatonic Features): Clinical Diagnosis **Key Point:** Although DSM-5 (2013) removed catatonic schizophrenia as a formal subtype, the clinical entity is now coded as **schizophrenia with catatonic features (specifier)**. In the context of NEET PG/INI-CET, "catatonic schizophrenia" (Option D) remains the best answer when catatonia is the **predominant** presentation of an underlying primary psychotic disorder, as opposed to paranoid features being predominant. ### Diagnostic Hierarchy and Exclusions | Step | Finding | Conclusion | |------|---------|------------| | Rule out medical/organic cause | No fever, normal metabolic panel, normal neuro exam | Medical catatonia excluded → Option A eliminated | | Rule out mood disorder | No prominent depressed mood, anhedonia, guilt, or manic features | Catatonic MDD/bipolar excluded → Option C eliminated | | Identify predominant psychotic feature | 2-month paranoid prodrome + **3-week dominant catatonic syndrome** (mutism, waxy flexibility, bizarre posturing, negativism) | Catatonia is the **predominant** feature | | Paranoid vs. Catatonic type | Paranoid type: delusions/hallucinations predominate; Catatonic type: motor abnormalities predominate | Option D > Option B | ### Features Supporting Catatonic Schizophrenia (Option D over Option B) | Feature | Present | Significance | |---------|---------|---------------| | **Mutism** | Yes | Core catatonic sign | | **Waxy flexibility (cerea flexibilitas)** | Yes | Pathognomonic of catatonia | | **Bizarre posturing** | Yes | Core catatonic sign | | **Psychotic prodrome** (2-month suspicion/withdrawal) | Yes | Establishes primary psychotic disorder | | **Normal labs, no fever** | Yes | Excludes NMS, encephalitis, metabolic catatonia | | **Eyes follow examiner** | Yes | Preserved consciousness; not organic stupor | **High-Yield:** The **predominant motor/catatonic syndrome** (mutism + waxy flexibility + posturing) in the context of a psychotic prodrome = **catatonic schizophrenia** (DSM-IV terminology) / **schizophrenia with catatonic features** (DSM-5). The motor abnormalities dominate the clinical picture, distinguishing this from paranoid schizophrenia where delusions/hallucinations are the primary feature. **Clinical Pearl (DSM-5 Update):** DSM-5 eliminated the five classical subtypes of schizophrenia (paranoid, disorganized, catatonic, undifferentiated, residual) and replaced them with dimensional specifiers. Catatonia is now a **specifier** applicable to schizophrenia, mood disorders, and other conditions. For NEET PG purposes, "catatonic schizophrenia" (Option D) is the expected answer when catatonic features predominate in a schizophrenic illness. ### Why Not Option B (Paranoid Schizophrenia with Catatonic Features)? - Paranoid schizophrenia is characterized by **prominent delusions of persecution or grandeur and/or auditory hallucinations** as the dominant feature. - In this vignette, the **dominant presentation is catatonia** (mutism, waxy flexibility, posturing) — not paranoid delusions. - While the 2-month prodrome included suspicion, the acute presentation is overwhelmingly catatonic, making Option D the better descriptor. **Mnemonic — Catatonic Features (WASPNIM):** **W**axy flexibility, **A**utomatic obedience, **S**tupor/mutism, **P**osturing, **N**egativity, **I**mmobility, **M**utism. [cite: Kaplan & Sadock's Synopsis of Psychiatry, 12e, Ch. 5; DSM-5 Schizophrenia Spectrum and Other Psychotic Disorders; ICD-10 F20.2 Catatonic Schizophrenia]