The objective is to determine which listed deformity does not involve the lower body extremities, specifically the hips, legs, knees, ankles, and feet.
1. Analysis of Options:
- (A) Knock-Knee: This condition involves the knees touching when standing erect, while ankles remain apart. It impacts the legs and knees, unequivocally a lower extremity issue.
- (B) Scoliosis: Characterized by a sideways curvature of the spine, affecting the vertebral column (thoracic and lumbar regions) and not the lower limbs.
- (C) Bow-Legs: In this condition, the legs curve outwards at the knees, with feet and ankles touching. This is a deformity of the lower limbs.
- (D) Flat-foot: This refers to the collapse of the foot arches, leading to the entire sole contacting the ground. This is also a lower extremity deformity.
2. Determination:
Among the provided options, only scoliosis pertains to the spine and is unrelated to the lower extremities.
Final Answer:
(B) Scoliosis