Which structures would most likely be demonstrated in a 99mTc-medronate image of the lumbar spine and pelvis?

In a 99mTc-medronate image, which is utilized for imaging bone structures, it is important to recognize that this radiopharmaceutical has a high affinity for areas of increased osteoblastic activity. The lumbar spine and pelvis are bone regions commonly evaluated due to their significance in various conditions, including metastatic disease and degenerative changes.

The correct choice includes the iliac crests and distal femur, as both regions would typically show uptake in a medicated bone scan due to their active bone remodeling processes. Furthermore, the involvement of the 10th to 12th thoracic vertebrae is relevant because these areas can also exhibit increased uptake related to either pathological or physiological changes.

The iliac crests represent a major part of the pelvic bone structure and are pivotal for assessing conditions that affect bone density and metabolism. The distal femur is included due to its proximity to the pelvis and continued bone turnover. The 10th to 12th thoracic vertebrae may display radiopharmaceutical uptake as they could reflect issues such as metastatic lesions, which can sometimes extend from abdominal malignancies or other sources.

Overall, the comprehensive inclusion of the iliac crests, distal femur, and the specified thoracic vertebrae