Fracture of base of first metacarpal joint without dislocation is called?
**Core Concept**
Fracture of the base of the first metacarpal joint is a common injury that occurs when the thumb is subjected to a forceful blow. This type of fracture can be challenging to diagnose and treat due to its location and the potential for associated injuries.
**Why the Correct Answer is Right**
The correct term for this type of fracture is a "Boxer's Fracture." This is because it is a common injury seen in boxers, who often sustain this type of fracture when punching an opponent. The fracture occurs when the metacarpal bone is compressed and fractured at its base, just proximal to the carpometacarpal joint. The surrounding soft tissues, including the carpometacarpal ligaments and the thumb muscles, may also be injured.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a "Scaphoid Fracture" refers to a fracture of the scaphoid bone in the wrist, which is a different type of injury altogether.
**Option B:** This option is incorrect because a "Hamate Fracture" refers to a fracture of the hamate bone in the wrist, which is also a different type of injury.
**Option C:** This option is incorrect because a "Boxer's Fracture" specifically refers to a fracture of the base of the first metacarpal joint, whereas a "Colles' Fracture" refers to a fracture of the distal radius.
**Clinical Pearl / High-Yield Fact**
A Boxer's Fracture can be challenging to diagnose because the fracture may be subtle on X-ray, and the surrounding soft tissues may be injured. A thorough clinical examination and a careful review of the X-ray images are essential for accurate diagnosis.
**Correct Answer:** C. Boxer's Fracture.