system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: History, Ancient, Humans, Male, Mexico, Paleopathology, Radiography, Radius, Ribs, Spine, Spondylitis, Ankylosing.
user
Is ankylosing spondylitis indigenous to Mesoamerica? Context: Paleopathology helps to define the origin and the migration of diseases. It has been established that genetic and environmental factors play a role in the pathogenesis of ankylosing spondylitis (AS). We investigated whether AS was present in Mesoamerica before contact with the European civilization. We studied the collection of Mesoamerican human skeletal remains preserved at the National Museum of Anthropology of Mexico, searching for features of AS. We found one incomplete specimen of a man of the Postclassic period (900-1521 AD). It showed fusion of the vertebral column from T8 to L5 due to ankylosis of the apophyseal joints and of the spinal processes. The pelvis was not preserved. Radiographs demonstrated ossification of both supraspinous and interspinous ligaments.
assistant
Our findings suggest AS was present in Mesoamerica before the arrival of Europeans. Final Decision: yes