Equine Navicular Disease/Palmar Digital Pain – NAVLE Study Guide

Overview and Clinical Importance

Navicular syndrome (also termed navicular disease, podotrochlear syndrome, or palmar foot pain) represents a chronic, progressive degenerative condition affecting the podotrochlear apparatus of the equine foot. This syndrome accounts for approximately one-third of all chronic forelimb lameness cases in horses and is one of the most commonly tested equine lameness topics on the NAVLE examination.

The condition primarily affects the forelimbs and is almost always bilateral, though one limb is typically more severely affected. Understanding the anatomy, pathophysiology, diagnosis, and treatment of navicular syndrome is essential for NAVLE success.

Anatomy of the Podotrochlear Apparatus

The podotrochlear apparatus (navicular apparatus) is a complex of structures located in the palmar aspect of the equine foot. Understanding this anatomy is critical for interpreting diagnostic findings and planning treatment.