Oesophageal lesions due to spinal fractures are very rare and easily overlooked. In this case report a woman was involved in a minor car accident, and she was primarily examined at the accident & emergency department with no signs of fractures. Ten days later, she was readmitted due to high infection counts and back pain. She had an unstable fracture of Th4 and a perforation of the oesophagus due to ankylosing fractures. The case emphasises the need to pay attention to a possible development of secondary oesophageal perforation in ankylosing spines and unstable fractures, and the need for a special attention when examinating this group of patients.