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Full Version: NBME 2 B1 Q 31-35 Please explain - irvinedawg
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31.) A healthy 42-year-old man comes to the physician for a life insurance evaluation.
He smoked one-half pack of cigarettes daily for 20 years but quit 10 years ago. His
father died of a myocardial infarction at the age of 65 years. The patient weighs 93
kg (205lb) and is 178 cm (70 in) tall. His blood pressure is 160/110 mm Hg,
pulse is 96/min, and respirations are 16/min. Physical examination, ECG, and an x-
ray film of the chest show no abnormalities. Laboratory studies are within normal
limits except for a serum cholesterol level of 206 mg/dL. Which of the following is
the greatest risk factor for cerebral infarction in this patient?

A) Genetic profile

B) History of smoking

C) Hypercholesterolemia

D) Hypertension

E) Obesity


32.) A previously healthy 56-year-old woman comes to the physician because of
jaundice and dark urine for 3 weeks. She has a 1-year history of generalized
pruritus. She takes no medications. Examination shows jaundice and several
ecchymoses over the forearms and thighs. The liver and spleen are enlarged and
nontender. Laboratory studies show:

Prothrombin time 18 sec
Serum Protein Total 8.5 g/dL
Albumin 3.8 g/dL
Bilirubin Total 5 mg/dL
Direct 2 mg/dL
Alkaline phosphatase 150 U/L
Alanine aminotransferase (ALT, GPT) 45 U/L
Antimitochondrial antibody assay is strongly positive.

A CT scan of the abdomen shows hepatosplenomegaly.
Endoscopic retrograde cholangiopancreatography shows no abnormalities.

Because of her condition, this patient is at greatest risk for which of the following
deficiencies?


A) Niacin

B) Vitamin A

C) Vitamin B2 (riboflavin)

D) Vitamin B12 (cyanocobalamin)

E) Vitamin C


33.) An asymptomatic 52-year-old man comes for a
follow-up
examination 1 month after he passed renal calculi. He
has a history of renal
calculi 2 years ago. Serum uric acid and calcium
levels and urinary
oxalate excretion are within normal limits. Urinary
calcium excretion is
increased. In order to avoid recurrence of renal
calculi, which of the
following is the most appropriate pharmacotherapy for
this patient?

A
) Bicarbonate

B
) Calcium lactate

C
) Methenamine mandelate

D
) Probenecid

E
) Thiazide diuretic


34.

A 57-year-old woman is brought to the emergency
department because of
abdominal pain for 12 hours. Over the past 3 hours,
the pain has become
severe and generalized. Over the past month, she has
had mild upper
abdominal discomfort that is relieved by eating. She
has a history of
recurrent migraines treated with sumatriptan as
needed. Her temperature
is 38.2 C (100.8 F), blood pressure is 170/95 mm Hg,
and pulse is
110/min. Abdominal examination shows mild distention;
there is marked
rigidity with diffuse tenderness. Bowel sounds are
absent. Rectal
examination shows no abnormalities; test of the stool
for occult blood is
negative. Laboratory studies show:


Hematocrit 36%
Leukocyte count 16,500/mm3
Serum
Na+ 145 mEq/L
Cl“ 106 mEq/L
K+ 3.8 mEq/L
HCO3“ 19 mEq/L
Urea nitrogen (BUN) 32 mg/dL

Which of the following is the most appropriate next
step in diagnosis?

A
) X-ray films of the abdomen while supine and
standing

B
) Abdominal ultrasonography

C
) Upper gastrointestinal series with contrast

D
) HIDA scan

E
) Fiberoptic endoscopy of the upper
gastrointestinal tract



35. An 18-year-old man comes to the physician
because of itchy
lesions on his penis for 2 weeks and itching around
his wrists and ankles
for 1 week. He is sexually active and does not
consistently use condoms.
Examination shows scattered, crusted lesions on the
penis and no
significant inguinal lymphadenopathy. There are
excoriated papules on the
wrists and ankles, a few papules between the fingers,
and excoriations
along the belt line. Which of the following is the
most likely
diagnosis?

A
) Disseminated primary herpes simplex

B
) Eczema

C
) Scabies

D
) Secondary syphilis

E
) Vasculitis