A 35 yr old lady with chronic backache. On X ray she had a D12 collapse. But Interveebral disc space is maintained. All are possible except:
**Core Concept**
The question is testing the understanding of vertebral compression fractures and the preservation of intervertebral disc space in various conditions. Vertebral compression fractures occur when one or more vertebrae in the spine collapse, which can be caused by osteoporosis, trauma, or cancer. The maintenance of intervertebral disc space suggests that the disc itself is not involved in the process.
**Why the Correct Answer is Right**
The correct answer is related to the mechanism of vertebral compression fractures. In the case of a D12 collapse, the intervertebral disc space is maintained because the disc is not directly involved in the fracture. This is consistent with a vertebral compression fracture caused by osteoporosis or trauma. However, there are other conditions where the disc space is maintained, such as in vertebral hemangiomas or aneurysmal bone cysts.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is not a condition that typically causes a vertebral compression fracture with maintained intervertebral disc space. Osteoporosis is a common cause of vertebral compression fractures, and the disc space is usually maintained.
* **Option B:** This option is incorrect because it is not a condition that typically causes a vertebral compression fracture with maintained intervertebral disc space. Osteomalacia is a condition characterized by softening of the bones, which can lead to vertebral compression fractures, but the disc space is usually affected.
* **Option C:** This option is incorrect because it is not a condition that typically causes a vertebral compression fracture with maintained intervertebral disc space. Scoliosis is a condition characterized by an abnormal curvature of the spine, which can lead to vertebral compression fractures, but the disc space is usually affected.
* **Option D:** This option is incorrect because it is not a condition that typically causes a vertebral compression fracture with maintained intervertebral disc space. Tuberculosis of the spine is a condition that affects the vertebral bodies and intervertebral discs, leading to destruction of the disc space.
**Clinical Pearl / High-Yield Fact**
In patients with chronic backache and vertebral compression fractures, it is essential to evaluate for underlying conditions such as osteoporosis, trauma, or cancer. The maintenance of intervertebral disc space can help differentiate between various conditions.
**Correct Answer: D. Tuberculosis of the spine.**