Q:

Which ONE of the following is not a histological feature of chronic bronchitis?

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Which ONE of the following is not a histological feature of chronic bronchitis?


  1. Calcification of bronchial cartilages.
  2. Goblet cell metaplasia.
  3. Hypertrophy of smooth muscle.
  4. Mucous gland hyperplasia.
  5. Squamous metaplasia of respiratory epithelium.

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The answer is C. Smooth muscle hypertrophy is seen in bronchial asthma.

The histological features of chronic bronchitis include hyperplasia of the mucous glands (D) and goblet cell metaplasia in the terminal bronchioles.

Respiratory epithelium may undergo squamous metaplasia (E), and calcification of cartilage (A) can occur.

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