American Academy of Professional Coders (AAPC) Practice Exam

What defines an epiphyseal fracture?

1. Occurs in adults only

2. Occurs when the matrix is calcifying and chondrocytes are dying, common in children

3. Affects the exterior of the bone

4. Completely disrupts joint movement

The correct answer is: Occurs when the matrix is calcifying and chondrocytes are dying, common in children

An epiphyseal fracture is specifically associated with the growth plate of the bone, which is primarily composed of cartilage during childhood and adolescence. The defining characteristic of an epiphyseal fracture is that it occurs in areas where the bone is still forming, particularly at the ends of long bones where the epiphyses are located. The process mentioned in the correct answer, where the matrix is calcifying and chondrocytes are dying, aligns with the natural development of bones during the growth phases in children and adolescents. As the epiphyseal plates close after growth, fractures are less prevalent in adults, reinforcing the idea that this type of fracture is common in younger populations. Understanding this aspect of epiphyseal fractures provides insight into their occurrence primarily among pediatric patients and the implications for growth and healing due to the unique composition of their bones compared to adults.