A 4 year old child suffered from a fall on outstretched hand. X rays revealed a fracture with the fracture line at the physes with a small metaphyseal fragment.There was no epiphyseal fracture. What type of injury by Salter Harris Classification is this ?

**Core Concept**
The Salter-Harris classification is a system used to categorize physeal (growth plate) injuries in children. It helps predict the potential for growth disturbances and guides treatment decisions. The classification system includes six types of injuries, each with distinct characteristics.

**Why the Correct Answer is Right**
This injury involves a fracture line at the growth plate (physis) with a small metaphyseal fragment, but no epiphyseal fracture. This description aligns with Type I physeal injury, where the fracture line passes through the growth plate, but not through the epiphysis (the rounded end of the bone). The presence of a small metaphyseal fragment indicates that the fracture has propagated through the growth plate and into the metaphysis (the wider part of the long bone).

**Why Each Wrong Option is Incorrect**
**Option A:** Type II physeal injuries involve a fracture of the epiphysis, which is not present in this case.
**Option B:** Type III physeal injuries involve a fracture through the growth plate and into the epiphysis, with a metaphyseal fragment, but the epiphysis is not fractured in this case.
**Option C:** Type IV physeal injuries involve a fracture through the growth plate and into both the epiphysis and metaphysis, which is not described in this scenario.
**Option D:** Type VI physeal injuries involve a crush injury or a compression fracture through the growth plate, which is not described in this scenario.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the Salter-Harris classification is crucial for predicting the potential for growth disturbances and guiding treatment decisions in physeal injuries. A Type I injury, like the one described, typically has a good prognosis for growth recovery.

**Correct Answer: C. Type I physeal injury**