Question:
Which one of the following conditions is NOT true regarding Myotonic dystrophy?
Which one of the following conditions is NOT true regarding Myotonic dystrophy?
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Myotonic dystrophy causes gonadal atrophy, not enlargement.
Updated On: Jul 7, 2026
- Cardiac defects
- Cataract
- Frontal baldness
- Enlarged testis
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
We need to identify which one of these four features is NOT actually true of myotonic dystrophy.
Step 2: Key Formula or Approach:
Myotonic dystrophy is a multisystem genetic disease, and its features affect the heart, eyes, hair pattern, and gonads in specific, well documented ways that need to be individually checked.
Step 3: Detailed Explanation:
Cardiac defects, particularly conduction abnormalities and arrhythmias, are a well recognized and important feature of myotonic dystrophy, sometimes even causing sudden cardiac death.
Cataracts, specifically a characteristic early-onset posterior subcapsular type, are a true and classic feature of myotonic dystrophy.
Frontal balding, an early and distinctive pattern of hair loss at the front of the scalp, is also a true and classic feature of this disease, especially in men.
Testicular involvement in myotonic dystrophy causes testicular atrophy, not enlargement, due to the disease's effect on gonadal tissue, so enlarged testis is the incorrect, NOT true feature among these options.
Step 4: Final Answer:
So the feature that is NOT true regarding myotonic dystrophy is enlarged testis, since this disease actually causes testicular atrophy.
We need to identify which one of these four features is NOT actually true of myotonic dystrophy.
Step 2: Key Formula or Approach:
Myotonic dystrophy is a multisystem genetic disease, and its features affect the heart, eyes, hair pattern, and gonads in specific, well documented ways that need to be individually checked.
Step 3: Detailed Explanation:
Cardiac defects, particularly conduction abnormalities and arrhythmias, are a well recognized and important feature of myotonic dystrophy, sometimes even causing sudden cardiac death.
Cataracts, specifically a characteristic early-onset posterior subcapsular type, are a true and classic feature of myotonic dystrophy.
Frontal balding, an early and distinctive pattern of hair loss at the front of the scalp, is also a true and classic feature of this disease, especially in men.
Testicular involvement in myotonic dystrophy causes testicular atrophy, not enlargement, due to the disease's effect on gonadal tissue, so enlarged testis is the incorrect, NOT true feature among these options.
Step 4: Final Answer:
So the feature that is NOT true regarding myotonic dystrophy is enlarged testis, since this disease actually causes testicular atrophy.
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