<prompt> The most common site of involvement of spinal TB in children is at which of the following level?Lower thoracic veebraUpper thoracic veebraCervical veebraMid thoracic veebra  <response>: The upper thoracic spine is the most common site of spinal TB in children, the lower thoracic and upper lumbar veebrae are usually affected in adults. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page1347-48 