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Question 275 · LDEK · Examination and diagnosis

The “rule of 80” states that:

  1. A. 80% of neck masses are of thyroid gland and that 80% are inflammatory infiltration, out of which 80% are of bacterial origin.
  2. B. 80% of non-thyroid neck masses are neoplastic and that 80% are malignant, out of which 80% are metastases in lymph nodes.
  3. C. in elderly, 80% of neck masses are neoplastic and that 80% are benign, out of which 80% are lateral cervical and thyroglossal duct cysts.
  4. D. in elderly, 80% of neck masses are neoplastic and that 80% are malignant, out of which 80% is of glandular origin.
  5. E. none of the above-mentioned.
Hint

The rule applies to adult neck masses outside the thyroid and moves stepwise from neoplasm to malignancy to nodal metastasis.

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