[Post-microtraumatic cervical osteoarthritis in a cretaceus dinosaur]

Area of Science:

• Paleontology
• Vertebrate Paleontology
• Paleopathology

Background:

• Osteoarthritis is a common degenerative joint disease.
• Documenting osteoarthritis in non-avian dinosaurs provides insights into their health and biomechanics.
• The fossil record offers limited opportunities to study ancient pathologies.

Observation:

• A rare case of osteoarthritis was identified in a cervical vertebra of a Spinosaurus maroccanus fossil.
• The specimen represents one of the most ancient occurrences of osteoarthritis documented to date.
• The fossil underwent macroscopic, radiographic, and computed tomography (CT) scan analyses.

Findings:

• Macroscopic and radiographic analyses revealed degenerative changes consistent with osteoarthritis.
• Computed tomography scans provided detailed visualization of the affected vertebral structures.
• The findings confirm the presence of osteoarthritis in a Cretaceous theropod dinosaur.

Implications:

• This discovery pushes back the timeline for documented osteoarthritis in the fossil record.
• Understanding osteoarthritis in extinct species can inform comparative pathology and evolutionary studies.
• The study highlights the importance of advanced imaging in paleopathological research.