A 32-year-old man presents to the psychiatry clinic with his wife, who complains that he is excessively preoccupied with orderliness, perfectionism, and control. He spends 3–4 hours daily organizing his work files and becomes distressed if anything is out of place. He has difficulty delegating tasks at work because he believes no one can do them "correctly." He is rigid in his moral beliefs, reluctant to spend money even on necessities, and has few close relationships. His wife reports he is emotionally distant and rarely expresses affection. He denies any magical thinking, paranoia, or social anxiety. Mental status examination shows organized thought process, intact cognition, and euthymic mood. What is the most likely personality disorder diagnosis?

Explanation

## Diagnosis: Obsessive-Compulsive Personality Disorder (OCPD) ### Key Clinical Features Identified **Key Point:** This patient exhibits the core triad of OCPD: (1) preoccupation with orderliness and perfectionism, (2) difficulty delegating and need for control, and (3) emotional constriction with limited interpersonal warmth. ### Diagnostic Criteria Met (DSM-5) | Feature | Patient Presentation | OCPD Criterion | |---------|---------------------|----------------| | Perfectionism | 3–4 hrs daily organizing files, distress if disorganized | Interferes with task completion | | Control/delegation | Reluctant to delegate; believes others cannot do it "correctly" | Excessive devotion to control | | Moral rigidity | Rigid moral beliefs | Overconscientious about values | | Emotional distance | Rarely expresses affection, emotionally distant | Difficulty expressing warm emotions | | Work focus | Preoccupied with work organization | Work valued over relationships | ### Differential Diagnosis **High-Yield:** OCPD is a **personality pattern** (ego-syntonic; the patient sees these traits as desirable), whereas OCD is an **anxiety disorder** (ego-dystonic; the patient recognizes obsessions/compulsions as irrational and distressing). This patient does NOT report intrusive obsessions or compulsive rituals to reduce anxiety—he is simply organized and perfectionist by nature. **Mnemonic for Cluster C:** **AVOCADO** = Avoidant, Dependent, Obsessive-Compulsive. All three are anxious, fearful clusters characterized by rigidity and control-seeking (though expressed differently). ### Why Not Schizoid? Schizoid personality disorder features social withdrawal and anhedonia, but this patient's emotional distance stems from **overcontrol and perfectionism**, not lack of capacity for attachment. Schizoid individuals are indifferent to relationships; OCPD individuals are emotionally constricted but capable of commitment (evidenced by his marriage). ### Clinical Pearl **Clinical Pearl:** OCPD is the most common personality disorder in clinical and community samples. Patients often present because a loved one (spouse, parent) complains about their rigidity—they rarely self-refer for personality change. [cite:DSM-5 Section III]