Question

Which one of the following conditions is NOT true regarding Myotonic dystrophy?

• A. Cardiac defects
• B. Cataract
• C. Frontal baldness
• D. Enlarged testis

Hint:

Myotonic dystrophy causes gonadal atrophy, not enlargement.

Answer 1

The Correct Option is D

This question asks which feature does not actually belong to myotonic dystrophy, a multisystem genetic disease.

1. Cardiac defects: Conduction abnormalities and arrhythmias are a well recognized true feature of this disease.
2. Cataract: An early-onset posterior subcapsular cataract is a classic true feature.
3. Frontal baldness: An early, distinctive pattern of frontal hair loss is a true and classic feature, especially in men.
4. Enlarged testis: Myotonic dystrophy actually causes testicular atrophy, not enlargement, making this statement false.

Since testicular atrophy, not enlargement, is the true feature of myotonic dystrophy, enlarged testis is the one that does not belong.

Let's summarize:

• Cardiac conduction defects, cataracts, and frontal baldness are all true features of myotonic dystrophy.
• The disease causes testicular atrophy, not enlargement.

So the feature that is NOT true is enlarged testis.