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A 45-year-old lady present with cold intolerance and weight gain. There is swelling in the neck the most important investigation to confirm diagnosis is ______?

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A 45-year-old lady present with cold intolerance and weight gain. There is swelling in the neck the most important investigation to confirm diagnosis is ______? Answer: Thyroid function test

Cold intolerance and weight gain suggest hypothyroidism, while neck swelling may indicate thyroid enlargement. Thyroid function tests, particularly serum TSH and free thyroid hormone measurements, are central investigations for confirming and characterizing thyroid dysfunction.

Question context

This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the BPSC – Balochistan Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.