De Quervain’s disease is tenosynovitis of
**Core Concept**
De Quervain's disease is a condition characterized by **tenosynovitis**, which is inflammation of the tendon sheath. This condition specifically affects the tendons on the thumb side of the wrist. The underlying principle being tested is the knowledge of specific tendonopathies and their locations.
**Why the Correct Answer is Right**
The correct answer involves the tendons of the **abductor pollicis longus** and **extensor pollicis brevis**, which are the specific tendons involved in De Quervain's disease. This condition leads to pain and tenderness, especially when forming a fist, grasping, or turning the wrist.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not specify the correct tendons involved.
**Option B:** Incorrect as it refers to a different condition.
**Option C:** Incorrect because De Quervain's does not involve these tendons.
**Option D:** Incorrect as it is unrelated to the specific tendons of De Quervain's disease.
**Clinical Pearl / High-Yield Fact**
De Quervain's disease is often associated with repetitive movements or overuse, making it common among individuals with certain occupations or hobbies that involve frequent wrist and thumb motion.
**Correct Answer:** D. abductor pollicis longus and extensor pollicis brevis.