The upper outer quadrant (UOQ) of the breast contains the greatest volume of glandular tissue. Approximately what percentage of breast cancers originate in this quadrant?

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Multiple choice — select the best answer

A50%
B25%
C15%
D10%

✓ Correct answer: A. 50% About 50% of breast cancers arise in the upper outer quadrant because it contains the largest amount of glandular tissue of any single quadrant, including the axillary tail of Spence.

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Topic: Breast Anatomy

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The upper outer quadrant (UOQ) of the breast contains the greatest volume of glandular tissue. Approximately what percentage of breast cancers originate in this quadrant?

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