104. A 32-year-old man is brought to the emergency department by ambulance 30 minutes after he was found unresponsive by his wife. Paramedics say that his blood glucose concentration was 22 mg/dL by fingerstick at the scene. He became responsive following administration of an ampule of 50% dextrose. On arrival, he says that he has a 3-month history of episodes of sweating and feeling shaky. His symptoms resolve when he eats a candy bar. Physical examination shows no abnormalities. The tentative diagnosis of insulinoma is made. In addition to a decreased glucose concentration, which of the following sets of findings in this patient during a fasting-induced hypoglycemic episode is most likely to confirm the diagnosis? A) B) C) D) F) Serum C Peptide Insulin ↑ ↑ T ↓ ↓ Urine Ketones present absent present absent present absent
104. A 32-year-old man is brought to the emergency department by ambulance 30 minutes after he was found unresponsive by his wife. Paramedics say that his blood glucose concentration was 22 mg/dL by fingerstick at the scene. He became responsive following administration of an ampule of 50% dextrose. On arrival, he says that he has a 3-month history of episodes of sweating and feeling shaky. His symptoms resolve when he eats a candy bar. Physical examination shows no abnormalities. The tentative diagnosis of insulinoma is made. In addition to a decreased glucose concentration, which of the following sets of findings in this patient during a fasting-induced hypoglycemic episode is most likely to confirm the diagnosis? A) B) C) D) F) Serum C Peptide Insulin ↑ ↑ T ↓ ↓ Urine Ketones present absent present absent present absent
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