UWorld_6.8

Question 1

Quad screen results concerning for trisomy 21

Answer 1

• low a-fetoprotein
• low estriol
• elevated b-hcg
• elevated inhibin A

Question 2

most common brain tumors in children

Answer 2

• astrocytoma

- medulloblastoma = posterior fossa mass

Question 3

Evaluation of suspected pancreatic cancer

Answer 3

• p/w obstructive jaundice ==> likely @ head ==> US

- p/w/out obstructive jaundice ==> likely @ tail ==> CT

Question 4

First-line for endocarditis in IVDU

Answer 4

vancomycin

Question 5

Exenatide: brand name, MOA, SE

Answer 5

• exanatide = Byetta
• MOA: GLP-1 receptor agonist
• 2nd line w/metformin
• low hypoglycemia risk
• SE: weight loss

Question 6

Chlordizepoxide: class, use

Answer 6

• benzo

- used in EtoH tx

Question 7

Most common causes of folic acid deficiency

Answer 7

• poor diet

- drugs: phenytoin, methotrexate, TMP

Question 8

VIPoma presentation

Answer 8

• tumor of pancreatic cells => VIP
• watery diarrhea (secretory diarrhea)
• m. weakness/cramps 2/2 hypokalemia
• hypochlorhydia 2/2 decreased gastric acid secretion
• VIP level > 75 pg/ml