A 74yo man who has been a smoker since he was 20 has recently been dx with SCLC. What
serum electrolyte picture will confirm the presence of SIADH?
a. High serum Na, low serum osmolarity, high urine osmolarity
b. Low serum Na, low serum osmolarity, high urine osmolarity
c. Low serum Na, high serum osmolarity, high urine osmolarity
d. High serum Na, low serum osmolarity, low urine osmolarity
e. High serum Na, high serum osmolarity, low urine osmolarity
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Answer B: siadh > hyponatremia, low serum osmolarity, high urine osmolarity
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