Question
A young boy with thin built and long fingers presents with diminished vision. On examination subluxation of lens is observed and cystathione synthase deficiency was detected. Which aminoacid should the patient be supplied with
| A. |
Serine
|
| B. |
Tyrosine
|
| C. |
Methionine
|
| D. |
Cysteine
|
Show Answer
|
Correct Answer � D
Explanation
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|
The patient’s symptoms of gradual diminution of vision, dry eyes, and a rough corneal surface are suggestive of xerophthalmia, which is caused by a deficiency of vitamin A (retinoic acid).
Detailed Breakdown:
A. Iron: Iron deficiency can lead to anemia, which can cause fatigue, weakness, and pallor, but it does not directly cause the eye symptoms described.
B. Protein: Severe protein deficiency can lead to a variety of symptoms, including edema, hair loss, and skin changes, but it is not the primary cause of the eye symptoms described.
C. Niacin: Deficiency of niacin leads to pellagra, which is characterized by the triad of dermatitis, diarrhea, and dementia. It does not cause the eye symptoms described.
D. Retinoic Acid (Vitamin A): Vitamin A deficiency can lead to xerophthalmia, which includes symptoms like night blindness, dry eyes (xerosis), Bitot’s spots (foamy patches on the white of the eye), and a rough corneal surface (keratomalacia). Chronic deficiency can lead to blindness. Thus, the symptoms described in the question are consistent with vitamin A deficiency.
