**Question:** Cabitus varus is most commonly seen in -

A. Children
B. Elderly
C. Adolescents
D. Geriatric patients with Parkinson's disease

**Core Concept:**
Cabitus varus, also known as genu varum, is a condition characterized by an outward rotation of the tibia and fibula bones in the lower limb, particularly in the knee joint. This condition is commonly associated with structural deformities and can lead to pain, difficulty in walking, and potential long-term complications if left untreated.

**Why the Correct Answer is Right:**
Cabitus varus is most commonly seen in the elderly (option D). As people age, the cartilage in their joints can wear down, leading to osteoarthritis and changes in joint alignment. In the case of cabitus varus, the loss of cartilage and underlying bone structure causes the legs to become bowlegged due to the outward rotation of the lower leg bones. In contrast, children typically have immature skeletal systems that are still developing, and adolescents have growing bones that can correct the deformity through growth spurts.

**Why Each Wrong Option is Incorrect:**

A. Children (option A) are generally too young to have significant bone deformities from osteoarthritis or wear and tear. Their bones are still developing, and the condition is more likely to resolve as they grow and mature.
B. Elderly people (option B) are more prone to cabitus varus due to the factors mentioned above, such as osteoarthritis and loss of cartilage.
C. Adolescents (option C) also have growing bones, but the condition is less common in this age group compared to children, as they are closer to adulthood when the skeletal changes are less likely to correct the deformity.

**Clinical Pearl:**
The term "bowlegged" used to describe cabitus varus can be misleading. Although the legs appear bowed, the underlying pathology is a result of osteoarthritis and bone changes, not a physical deformity. Early diagnosis and treatment can help prevent complications associated with the condition.