Repeated USMLE Questions Step 1- Review- 52

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Q- A patient with a history of renal disease presents to the clinic for a follow up and renal function tests.  Clearance of which one of the following substances is used to estimate the glomerular filtration rate?

A-Calcium

B-Inulin

C-Potassium

D-Sodium

B-Inulin- It is neither reabsorbed nor secreted so, it is used to estimate glomerular filtration rate. Other substances are reabsorbed and/or secreted through renal pathway.



Q- An immunocompromised patient complains of fever, increasing dyspnea and cough for 2 weeks. Cytologic examination of his bronchoalveolar lavage shows enlarged cells with prominent intranuclear inclusions.

Which of the following is most likely the causative organism?

A-Candida albicans

B-Cytomegalovirus

C-Pneumocystis jirovecii

D-Respiratory syncytial virus

B-Cytomegalovirus- This clinical picture and cytologic examination of an immunocompromised patient are typical for cytomegalovirus infection.



Q- Which one of the following types of anemia is not associated with previous drug use?

A-Autoimmune hemolytic anemia

B-Aplastic anemia

C-G6PD deficiency

D-Microcytic anemia

D-Microcytic anemia- This type of anemia is not caused by drug use but is associated mainly with iron deficiency.



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2 thoughts on “Repeated USMLE Questions Step 1- Review- 52”

  1. Hello Dr. Hamo, as answer explanation shows, it is a viral infection caused by cytomegalovirus infection. The cytologic exam. confirm it. Can you please let me know what is your thoughts on that.
    Thank you

  2. Hello sir could you elaborate question 2 please
    PCJ with immunocompromised ?

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