From Dog
Radiograph of a dog with radial agenesis showing complete absence of the radius and poor congruency of the humeroulnar joint[1]

Hemimelia in dogs is defined as the absence of significant shortening of a limb. This commonly affects the radius (radial agenesis) or tibia.

Malformations of the extremities or parts of them are varied in their manifestations, ranging from absence of a single structure to partial or complete absence of the limbs[2].

If all or part of the middle bones of a limb are absent, with the proximal and distal portions being present, the hemimelia is called intercalary.

The longitudinal hemimelia indicates the absence of one or more bones along the preaxial (medial) or postaxial (lateral) side of the limb[3]. Preaxial longitudinal intercalary radial hemimelia is the most common type of hemimelia in dogs. This condition is usually unilateral, but bilateral absence may occur.

The condition is usually noticed soon after birth[4].


  1. Veterinary Research Institute
  2. Lallo MA et al (2001) Bilateral anterior hemimelia in a dog: A case report. In: 26th World Small Animal Veterinary Association (WSAVA) World Congress, Vancouver, British Columbia, Canada. Held on August 8–11
  3. Mo JH & Manske PR (2004) Surgical treatment of type 0 radial longitudinal deficiency. J Hand Surg 29:1002–1009
  4. Towle HA & Breur GJ (2004) Dysostoses of the canine and feline appendicular skeleton. J Am Vet Med Assoc 225:1685–1692