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TH🔥 TSH vs T3 vs T4 – High-Yield Exam Points
🧠 TSH = Most sensitive screening test (FIRST test in thyroid disorders)
👑 TSH is the BOSS (negative feedback control)
⚡ T3 = Most active hormone (responsible for symptoms)
📦 T4 = Prohormone (storage form) → converts to T3 in peripheral tissues
📊 Key Interpretation (VERY IMPORTANT)
⬆️ TSH + ⬇️ T3/T4 → Hypothyroidism
⬇️ TSH + ⬆️ T3/T4 → Hyperthyroidism
⚠️ Subclinical States (Frequently Asked)
⬆️ TSH + Normal T4 → Subclinical Hypothyroidism
⬇️ TSH + Normal T4 → Subclinical Hyperthyroidism
🧩 Clinical Clues (Quick Recall)
Hypothyroidism → Fatigue, Weight gain, Cold intolerance, Bradycardia
Hyperthyroidism → Weight loss, Heat intolerance, Tachycardia, Tremor
💡 One-Line Memory Trick
👉 “High TSH = LOW thyroid (Hypo)”
👉 “Low TSH = HIGH thyroid (Hyper)”
📌 #Hashtags
#NCLEXPrep #ThyroidDisorders #Endocrinology #ExamRevision MedicalStudents
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