A 25 year old female presents with 2 year history of repetitive, irresistible thoughts of contamination with dirt associated with repetitive hand washing. She reports these thoughts to be her own and distressing but is not able to overcome them along with medication. She is most likely to benefit from which of the following therapies –

**Core Concept**
The patient's symptoms of repetitive, intrusive thoughts of contamination with dirt associated with repetitive hand washing suggest a diagnosis of Obsessive-Compulsive Disorder (OCD). OCD is characterized by unwanted and intrusive thoughts (obsessions) that trigger repetitive behaviors (compulsions) aimed at reducing anxiety.

**Why the Correct Answer is Right**
The patient's symptoms are a classic example of a type of OCD known as "contamination OCD." This subtype is often associated with a fear of germs, dirt, or other contaminants. The patient's distressing thoughts and inability to overcome them, despite medication, suggest a need for a therapy that targets the underlying psychological mechanisms driving her symptoms. Cognitive-behavioral therapy (CBT), specifically Exposure and Response Prevention (ERP), is a well-established treatment for OCD that involves helping patients confront their fears in a controlled manner while preventing them from engaging in their typical compulsive behaviors.

**Why Each Wrong Option is Incorrect**
**Option A:** Dialectical Behavior Therapy (DBT) is a type of therapy that focuses on emotional regulation and distress tolerance, but it is not the primary treatment for OCD.
**Option B:** Psychodynamic therapy may help patients understand the underlying causes of their symptoms, but it is not as effective as CBT in reducing OCD symptoms.
**Option C:** Medication, such as selective serotonin reuptake inhibitors (SSRIs), may help alleviate symptoms of OCD, but it is not a replacement for therapy.
**Option D:** Family therapy may be helpful in addressing family dynamics and relationships, but it is not the primary treatment for OCD.

**Clinical Pearl / High-Yield Fact**
ERP is a highly effective treatment for OCD, with studies showing that it can lead to significant reductions in symptoms and improvement in quality of life.

**Correct Answer:** C.

✓ Correct Answer: A. Exposure and response prevention