The lateral S-shaped curvature of the spine is called?

Appeared in: AIIMS Patna NO - 2020

Explanation

Scoliosis is defined as an abnormal lateral, or side-to-side, curvature of the spine.
The spine can form a 'C' or 'S' shape, which matches the 'S-shaped' description in the question.
This condition is a three-dimensional deformity, involving rotation of the vertebrae in addition to the lateral curve.

Option B: Musculosis is not a standard medical term used to describe a curvature of the spine.
Option C: Kyphosis is an anteroposterior (forward) curvature of the spine, not a lateral (side-to-side) one. It is an excessive outward curve of the upper back, causing a 'hunchback' appearance.
Option D: Lordosis is also an anteroposterior (inward) curvature, not a lateral one. It is an excessive inward curve of the lower back, creating a 'swayback' posture.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Types of Abnormal Spinal Curvatures as background academic context rather than a clinical decision trigger.
Nurses perform screening for scoliosis using the Adam's forward bend test, observing for asymmetry of the shoulders, scapulae, or hips, and the presence of a rib hump.
In severe cases (curves greater than 50-70 degrees), scoliosis can restrict the chest cavity, leading to compromised lung and heart function. Nursing assessment must include respiratory status.
What if? If a school-aged child is diagnosed with mild scoliosis, the nursing priority is not immediate treatment but rather education and scheduled follow-ups. The focus is on monitoring for curve progression during growth spurts, as this is when the deformity is most likely to worsen.

How to Approach the Question

First, identify the key descriptive terms in the question: 'lateral' and 'S-shaped curvature'.
Recall the definitions of the common spinal deformities provided in the options.
'Lateral' means side-to-side. This allows you to differentiate from anteroposterior (front-to-back) curvatures.
Kyphosis ('hunchback') and Lordosis ('swayback') are anteroposterior curves, so they can be eliminated.
Scoliosis is specifically defined as a lateral curvature, which often presents in an 'S' or 'C' shape.
Therefore, 'Scoliosis' is the only option that matches the description 'lateral S-shaped curvature'.

Concept Tested & Keywords

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E6 Nursing Fundamentals Taylor p. 408-410

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 2054-2056

E6 Anatomy Grays 43e Vol 2 Part 2 p. 6-8

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