Question
Kohler's disease is avascular necrosis of :
The correct answer is
Navicular
Kohler's Disease: Avascular Necrosis Location
Kohler's disease is a medical condition characterized by avascular necrosis, meaning the temporary loss of blood supply to a bone, leading to bone death.
Affected Bone
In Kohler's disease, the avascular necrosis specifically affects the Navicular bone. This is a tarsal bone located in the foot, contributing to the arch.
Understanding the Condition
- Cause: Interruption of blood flow to the navicular bone.
- Affected Area: Primarily occurs in children, often affecting one foot.
- Symptoms: Typically presents as pain, swelling, and tenderness over the top or inner side of the foot's arch.
- Diagnosis: Often diagnosed through X-rays, which show changes consistent with avascular necrosis in the navicular bone.
Analysis of Options
- Lunate: Avascular necrosis of the lunate bone is known as Kienböck's disease, affecting the wrist.
- Capitellum of humerus: Avascular necrosis can occur here (e.g., Panner's disease in children), but it is not Kohler's disease.
- First metatarsal head: Avascular necrosis can affect metatarsal heads (e.g., Freiberg's infarction), but typically not the first, and it is distinct from Kohler's disease.
- Navicular: This is the correct site for Kohler's disease.
Therefore, Kohler's disease is avascular necrosis of the Navicular bone.
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