What is the term for osteoarthritis of the proximal, middle, or distal phalanx due to periostitis, with high involvement around the pastern and low around the coffin?

What is the term for osteoarthritis of the proximal, middle, or distal phalanx due to periostitis, with high involvement around the pastern and low around the coffin?

• A. Osselets
• B. Ringbone
• C. Navicular disease
• D. Bucked shins

Answer: (B)

Ringbone is the name for osteoarthritis of the pastern region caused by periosteal inflammation along the small bones of the toe. When the involvement is high, it affects the area around the proximal interphalangeal joint near the pastern; when it’s low, it involves the distal interphalangeal joint near the coffin bone. This pattern matches osteoarthritis of the phalanges driven by periostitis in the pastern region, with more pronounced changes at the pastern and less at the coffin. Other conditions are different from this pattern: osselets are periosteal inflammation around the fetlock region, navicular disease involves the navicular apparatus at the heel, and bucked shins refers to periosteal inflammation along the cannon bone in young horses.

Ringbone is the name for osteoarthritis of the pastern region caused by periosteal inflammation along the small bones of the toe. When the involvement is high, it affects the area around the proximal interphalangeal joint near the pastern; when it’s low, it involves the distal interphalangeal joint near the coffin bone. This pattern matches osteoarthritis of the phalanges driven by periostitis in the pastern region, with more pronounced changes at the pastern and less at the coffin. Other conditions are different from this pattern: osselets are periosteal inflammation around the fetlock region, navicular disease involves the navicular apparatus at the heel, and bucked shins refers to periosteal inflammation along the cannon bone in young horses.