What term describes a fracture specifically at the pars interarticularis?

• A. Compression fracture
• B. Stress fracture
• C. Spondylolysis
• D. Transversal fracture

Answer: (C)

The correct term for a fracture that occurs specifically at the pars interarticularis is spondylolysis. The pars interarticularis is a small segment of bone that connects the superior and inferior articular processes of a vertebra, and it is particularly vulnerable to stress and injury.

Spondylolysis typically arises due to repetitive stress or a single traumatic event, which can lead to a fracture of the pars interarticularis. This condition is commonly seen in young athletes involved in sports that require significant trunk extension or hyperextension, such as gymnastics or football.

Understanding this specific terminology is crucial for clinical practice and diagnosis. The other terms refer to different types of fractures or conditions. For instance, a compression fracture involves the collapse of a vertebra typically due to osteoporotic changes or trauma, while a stress fracture refers to a hairline crack in a bone due to chronic overuse. A transversal fracture, on the other hand, is a fracture that runs horizontally through the bone and does not pertain specifically to the vertebral anatomy being discussed.

Thus, identifying spondylolysis as the correct term highlights its specific relevance to the injuries associated with the pars interarticularis.