A 25-year old housewife came to the Psychiatry out patient depament (OPD) complaining that her nose was longer than usual. She felt that her husband did not like her because of the deformity and had developed relation-ship with the neighbouring girl. Fuher she complained that people made fun of her. It was not possible to convince her that there was no deformity. Her symptoms include

**Core Concept**
Delusional disorder is a psychiatric condition characterized by the presence of one or more non-bizarre delusions that last for at least one month. These delusions are not explained by a psychiatric or medical condition and are not due to the direct effect of a substance. In this case, the patient's delusion of a nose deformity is a classic example of a non-bizarre delusion.

**Why the Correct Answer is Right**
The patient's symptoms meet the diagnostic criteria for delusional disorder, with a primary delusion of a non-bizarre nature (a nose deformity). This delusion is persistent and not amenable to reasoning or evidence to the contrary. The patient's feelings of persecution and social isolation are secondary to the primary delusion. The lack of insight into the delusion, as evidenced by the patient's inability to be convinced of the non-existence of the deformity, is also a key feature of delusional disorder.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify a particular psychiatric condition. While it may be a symptom of various conditions, it is not the correct diagnosis in this case.

**Option B:** This option is incorrect as it refers to a different psychiatric condition characterized by a break from reality, disorganized thinking, and a disconnection from the environment. This is not the correct diagnosis for the patient's symptoms.

**Option C:** This option is incorrect as it refers to a mood disorder characterized by persistent sadness and loss of interest in activities. While the patient may exhibit some depressive symptoms, the primary diagnosis is delusional disorder.

**Option D:** This option is incorrect as it refers to a psychotic disorder characterized by a disconnection from reality and a break from the environment. This is not the correct diagnosis for the patient's symptoms.

**Clinical Pearl / High-Yield Fact**
Delusional disorder is often associated with social isolation, as individuals with the disorder may become withdrawn and avoid social interactions due to their delusions. Clinicians should be aware of this and approach patients with delusional disorder with empathy and understanding.

**Correct Answer:** A. Delusional Disorder

✓ Correct Answer: A. Delusion