The costal angle should be less than 90 degrees; larger than 90 degrees suggests what?

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Multiple Choice

The costal angle should be less than 90 degrees; larger than 90 degrees suggests what?

Explanation:
An increased costal angle indicates hyperinflation of the lungs, producing a barrel-shaped chest. In this condition, the ribs sit more horizontally and the lower costal margins flare outward, widening the angle beyond 90 degrees. A normal chest keeps the angle under 90 degrees. Pleurisy mainly causes chest pain and shallow breathing, not a widened costal angle, and pectus carinatum is a chest-wall deformity that changes contour differently and isn’t the classic cause of an enlarged costal angle.

An increased costal angle indicates hyperinflation of the lungs, producing a barrel-shaped chest. In this condition, the ribs sit more horizontally and the lower costal margins flare outward, widening the angle beyond 90 degrees. A normal chest keeps the angle under 90 degrees. Pleurisy mainly causes chest pain and shallow breathing, not a widened costal angle, and pectus carinatum is a chest-wall deformity that changes contour differently and isn’t the classic cause of an enlarged costal angle.

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