Vertebra plana (plural: vertebrae planae), also known as the pancake or silver dollar or coin-on-edge vertebra, is the term given when a vertebral body has lost almost its entire height anteriorly and posteriorly, representing a very advanced compression fracture.
It can occur in a variety of settings, including:
- Langerhans cell histiocytosis (LCH)
- most common cause of vertebra plana in children
- osteogenesis imperfecta
- most common primary pediatric malignancy
- loss of vertebral height and increased sclerosis are common in the vertebral body
- vertebral metastases
- multiple myeloma
- B-symptoms and multiple levels involvement unlike LCH, which commonly involves a single level
- vertebral hemangioma
There are a number of mnemonics for the causes of vertebra plana.
- platyspondyly: flattened vertebral bodies throughout the entire skeleton