Development of an Increased Signal Intensity in Fat-Suppressed Images into a Navicular Cyst of an 11-Year-Old Warmblood Horse Evidenced by Six Follow-Up Standing Low-Field Magnetic Resonance Imaging Examinations Over 2 Years

This case report demonstrates the development and management of an osseous cyst-like lesion in the spongiosa of the navicular bone in a high-level show jumper with chronic intermittent forelimb lameness. The first evidence of navicular bone pathology was increased signal intensity on fat-suppressed images in the medulla of the right navicular bone, which progressed to a cystic lucency identified on radiographs at 24 months. The horseʹs progress was documented over a period of 2 years and 2 months, including lameness investigation, treatment, radiographs, and six follow-up standing low-field magnetic resonance imagings. At the last clinical recheck, the horse showed no signs of lameness and continued to compete in show jumping at an international level event.