USMLE-Rx Step 2 Practice Q's

USMLE-Rx Step 2 CK Qmax Challenge #21022

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Check out today’s Step 2 CK Qmax Question Challenge.

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USMLE-Rx Step 2 Qmax Challenge #21022A 2.5-year-old girl was diagnosed with a viral upper respiratory infection last week and now presents to her physician with a brassy cough and purulent airway secretions. Her parents believed that she may have croup and attempted mist therapy without success. The patient has been febrile to 39.0°C (102.2°F) for the past 24 hours and has had difficulty breathing during the past hour. Her review of systems is otherwise negative, and the mother denies that the patient has had any drooling or difficulty/pain when swallowing. Her heart rate is 92/min, blood pressure is 92/60 mm Hg, respiratory rate is 21/min, and temperature is 38.9°C (102°F). A Gram stain of secretions obtained in the office is shown in the image.

What organism is most likely responsible for this patient’s condition?

A. Moraxella catarrhalis
B. Nontypeable Haemophilus influenzae
C. Pseudomonas aeruginosa
D. Staphylococcus aureus
E. Anaerobic organisms

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

USMLE-Rx Step 2 Qmax Challenge #21005

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Check out today’s Step 2 CK Qmax Question Challenge.

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USMLE-Rx Step 2 Qmax Challenge #21005A 2-year-old boy is brought to the clinic for evaluation after 2 days of low-grade tactile fever, irritability, and decreased activity. His mother reports that on waking him this morning, his pillow was stained with a small amount of yellow fluid. His heart rate is 92/min, blood pressure is 104/70 mm Hg, respiratory rate is 22/min, and temperature is 38.8°C (101.°F). His external ear canal is normal, and his otoscopic examination is shown in the image. Which of the following is the most likely bacterial pathogen implicated in this condition?

A. Haemophilus influenzae type B

B. Neisseria meningitidis

C. Pseudomonas aeruginosa

D. Staphylococcus aureus

E. Streptococcus pneumoniae

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

USMLE-Rx Step 2 Qmax Challenge #21423

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Check out today’s Step 2 CK Qmax Question Challenge.

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USMLE-Rx Step 2 Qmax Challenge #21423A 32-year-old man is found to have a solitary, firm mass in the thyroid on routine physical examination. He has no complaints and the remainder of his physical examination is unremarkable. Family history is significant for an uncle who died of thyroid cancer at age 40 years. A biopsy of the thyroid stained with Congo red is shown in the image.

What further study should be done in this patient?

A. Barium swallow
B. Measurement of serum insulin-like growth factor-1
C. Measurement of urinary metanephrine levels
D. MRI of the brain
E. Renal biopsy

———————–

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

USMLE-Rx Step 2 Qmax Challenge #21049

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USMLE-Rx Step 2 Qmax Challenge #21049An adolescent boy is evaluated for a recent skin infection (as shown in the image). He is otherwise healthy and has never had a similar episode. He has a noncontributory social and family history. During the interview, he mentions he really enjoys working out at the community gym each day. On physical examination, he has no symptoms other than a localized infection that is pruritic and mildly malodorous.

Which of the following tests is best to confirm diagnosis?

A. Full-thickness biopsy
B. Potassium hydroxide preparation
C. Skin allergen test
D. Tzanck smear
E. Wood’s lamp

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

USMLE-Rx Step 2 Qmax Challenge #21025

8

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USMLE-Rx Step 2 Qmax Challenge #21025A 2.5-month-old boy is brought to the emergency department for evaluation of fever. Two days prior to admission the patient developed a fever to 39.1°C (102.3°F) and became irritable with nasal discharge and decreased oral intake. His birth history is unremarkable. He lives at home with his mother and 6-year-old brother, who attends elementary school where several kids have been absent recently for illness. His heart rate is 137/min, blood pressure is 72/48 mm Hg, respiratory rate is 35/min, and rectal temperature is 39.3°C (102.7°F). Neurologic examination is remarkable for a lethargic-appearing child who is responsive to stimulation. His anterior fontanel is open and bulging. The resident caring for the patient is certain that he has acute bacterial meningitis and orders a lumbar puncture.

Which of the following cerebrospinal fluid results from the lumbar puncture would be most consistent with acute bacterial meningitis?

A. A
B. B
C. C
D. D
E. E

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

USMLE-Rx Step 2 Qmax Challenge #28028

11

Check out today’s Step 2 CK Qmax Question Challenge.

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USMLE-Rx Step 2 Qmax Challenge #28028A 62-year-old white man presents to the clinic with complaints of burning substernal pain. The pain begins about 1 hour after meals and recurs several times a week. It is worst when he lies flat at night and is sometimes associated with a sour taste. The patient’s voice is often hoarse the next morning. He admits that although the symptoms have bothered him for many years, he has never sought treatment until now. Social history is significant for a 40-pack-year smoking habit and chronic, heavy alcohol use. Physical examination is unremarkable, with no palpable lymphadenopathy. Esophagogastroduodenoscopy is performed, and the gastroesophageal junction is shown in the image.

Which of the following is biopsy of the distal esophagus likely to reveal?

A. Adherent pseudomembranes with hyphae
B. Columnar metaplasia with intestinal goblet cells
C. Fibrotic submucosa with mucosal atrophy
D. Ulcerated mucosa and endothelial cells containing nuclear and cytoplasmic inclusions
E. Ulcerated mucosa and epithelial cells containing nuclear inclusions

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This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

USMLE-Rx Step 2 Qmax Challenge #28013

7

Check out today’s Step 2 CK Qmax Question Challenge.

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USMLE-Rx Step 2 Qmax Challenge #28013Following the tests, the FDA recommends that the serum cut-off value for the new test be lowered.

If the researchers adopt a lower cut-off, what will be the effect on the number of false negatives and false positives?

A. A
B. B
C. C
D. D
E. E

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Want to know the ‘bottom line?’ Purchase a USMLE-Rx Subscription and get many more features, more questions, and passages from First Aid, including images, references, and other facts relevant to this question.

This practice question is an actual question from the USMLE-Rx Step 2 CK test bank. Get more Step 2 CK study help at USMLE-Rx.com.

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