First Aid USMLE Step 3 Questions and Correct
Detailed Answers (Verified Answers) ||Already
Graded A+||Newest Version
Quiz: A 42 year old woman presents with HA, nausea, vomiting, and a red eye that has
progressively worsened since this morning. She also notes vision changes. Exam reveals
conjunctival injection: a mid-range fixed, dilated pupil: and no focal weakness in the
extremities. What should you do next?
Ans: Use tonometry to check IOP. A pressure of over 30 mmHg confirms the diagnosis of
acute closed angle glaucome. Emergent referral to ophthamology and possible
hospitalization to reduce IOP. Treatment includes topical BB (timolol), IV acetazolamide,
and topical steroids.
Quiz: A 71 year old man with a history of well controlled asthma presents in November
for his annual checkup. He has no complaints, and his PE findings are unremarkable. He
received the pneumococcal vaccine 3 years ago. What should be given before the
completion of his visit?
Ans: Annual influenza vaccination is recommended for all patients over 6 months of age
who lack contraindications (severe allergy/ anaphylaxis to egg protein). The live
attenuated vaccine should not be used in populations who are pregnant,
immunosuppressed, or have taken influenza antiviral medication within 48 hours.
Quiz: A 68 year old woman is brought to your office because her son is concerned that
she is losing her memory. He describes several instances in which she forgot what he has
just told her, adding that she was recently unaware that he was calling to her at a crowded
park. She spends most of her time at home watching television. What is the diagnosis?
o
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in the number given.
, Ans: Presbycusis, or age related hearing loss. Hearing loss in elderly persons must be
evaluated. Patients may have difficulty distinguishing voices in a crowd, which is often
misinterpreted as memory loss. Patients may become socially isolated.
Quiz: A 24 year old medical student develops a rash when he puts on a pair of latex
examination gloves. What is the mechanism leading to this rash?
Ans: Allergic contact dermatitis is a result of delayed contact (type IV) hypersensitivity
caused by allergen-primed memory T lymphocytes (vs irritant contact dermatitis, which
results from cytokines released following irritant contact).
Quiz: A 26 year old man presents with targetoid papules that appeared on his palms 2
days ago. He states that he was recently prescribed a new antiseizure medication for his
epilepsy. He denies any other symptoms, and exam reveals no other lesions. What is the
diagnosis?
Ans: Erythema multiforme secondary to the new antiseizure medication. EM differs from
Steven-Johnson syndrome/ toxic epidermal necrolysis in that lesions are genrally localized
to the extremities (vs spreading from the face and trunk), and the disease course is usually
less severe.
Quiz: A 71 year old man complains of a lesion on his right flank that was preceeded by
tingling in the same area 1 day ago. Exam reveals a 4 inch band of painful vesicles with
secondary crusting and a clear midline border. What test do you send to confirm your
clinical diagnosis?
Ans: Although a clinical exam is typically sufficient for the diagnosis of herpes zoster, a
PCR of fluid from the lesion can be confirmatory. NSAIDs may be useful for pain control,
and antiviral therapy may speed resolution and decrease the likelihood of postherpetic
neuralgia.
o
o
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in the number given.
, Quiz: A patient presents for evaluation of a pigmented skin lesions. Biopsy reveals
melanocytes with marked atypia characteristic of melanoma. What feature is the most
important prognostic factor?
Ans: Depth of invasion of the melanoma
Quiz: A 74 year old man presents with inability to maintain an erection. Although the
problem started several years ago, he states that he ignored it because he thought it was a
normal part of aging. How should the patient be counseled?
Ans: Although erectile dysfunction is associated with age, it is still considered abnormal,
and patients with erection difficulties should be adequately evaluated for all potential
causes.
Quiz: A 70 year old man is prescribed terazosin for his benign prostatic hyperplasia. How
does the drug treat his condition, and what other medical condition does its mechanism of
action address?
Ans: Alpha blockers such as terazosin act on smooth muscle in the prostate, bladder neck,
and urethra. They also act on vascular smooth muscle, causing vasodilation; therefore,
they can work to lower HTN as well.
Quiz: A 41 year old woman with woman with no significant medical history comes to
your clinic for her first checkup. Her mother has type 2 DM. Her PE findings, including BMI,
are normal. Which screening tests might you recommend?
Ans: A Pap smear and HTN screening. A diabetes workup (fasting glucose test, HbA1c) is
not needed as the patient is under 45 years of age with a normal BMI. Given the patient's
age, a screening mammogram is controversial. It is important to discuss the risks, benefits,
and alternatives of screening before proceeding.
o
o
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in the number given.
Detailed Answers (Verified Answers) ||Already
Graded A+||Newest Version
Quiz: A 42 year old woman presents with HA, nausea, vomiting, and a red eye that has
progressively worsened since this morning. She also notes vision changes. Exam reveals
conjunctival injection: a mid-range fixed, dilated pupil: and no focal weakness in the
extremities. What should you do next?
Ans: Use tonometry to check IOP. A pressure of over 30 mmHg confirms the diagnosis of
acute closed angle glaucome. Emergent referral to ophthamology and possible
hospitalization to reduce IOP. Treatment includes topical BB (timolol), IV acetazolamide,
and topical steroids.
Quiz: A 71 year old man with a history of well controlled asthma presents in November
for his annual checkup. He has no complaints, and his PE findings are unremarkable. He
received the pneumococcal vaccine 3 years ago. What should be given before the
completion of his visit?
Ans: Annual influenza vaccination is recommended for all patients over 6 months of age
who lack contraindications (severe allergy/ anaphylaxis to egg protein). The live
attenuated vaccine should not be used in populations who are pregnant,
immunosuppressed, or have taken influenza antiviral medication within 48 hours.
Quiz: A 68 year old woman is brought to your office because her son is concerned that
she is losing her memory. He describes several instances in which she forgot what he has
just told her, adding that she was recently unaware that he was calling to her at a crowded
park. She spends most of her time at home watching television. What is the diagnosis?
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
[+254707240657] o Your Success is Our Mission!
o For online exams and tutor expert, please whatsapp me
in the number given.
, Ans: Presbycusis, or age related hearing loss. Hearing loss in elderly persons must be
evaluated. Patients may have difficulty distinguishing voices in a crowd, which is often
misinterpreted as memory loss. Patients may become socially isolated.
Quiz: A 24 year old medical student develops a rash when he puts on a pair of latex
examination gloves. What is the mechanism leading to this rash?
Ans: Allergic contact dermatitis is a result of delayed contact (type IV) hypersensitivity
caused by allergen-primed memory T lymphocytes (vs irritant contact dermatitis, which
results from cytokines released following irritant contact).
Quiz: A 26 year old man presents with targetoid papules that appeared on his palms 2
days ago. He states that he was recently prescribed a new antiseizure medication for his
epilepsy. He denies any other symptoms, and exam reveals no other lesions. What is the
diagnosis?
Ans: Erythema multiforme secondary to the new antiseizure medication. EM differs from
Steven-Johnson syndrome/ toxic epidermal necrolysis in that lesions are genrally localized
to the extremities (vs spreading from the face and trunk), and the disease course is usually
less severe.
Quiz: A 71 year old man complains of a lesion on his right flank that was preceeded by
tingling in the same area 1 day ago. Exam reveals a 4 inch band of painful vesicles with
secondary crusting and a clear midline border. What test do you send to confirm your
clinical diagnosis?
Ans: Although a clinical exam is typically sufficient for the diagnosis of herpes zoster, a
PCR of fluid from the lesion can be confirmatory. NSAIDs may be useful for pain control,
and antiviral therapy may speed resolution and decrease the likelihood of postherpetic
neuralgia.
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
[+254707240657] o Your Success is Our Mission!
o For online exams and tutor expert, please whatsapp me
in the number given.
, Quiz: A patient presents for evaluation of a pigmented skin lesions. Biopsy reveals
melanocytes with marked atypia characteristic of melanoma. What feature is the most
important prognostic factor?
Ans: Depth of invasion of the melanoma
Quiz: A 74 year old man presents with inability to maintain an erection. Although the
problem started several years ago, he states that he ignored it because he thought it was a
normal part of aging. How should the patient be counseled?
Ans: Although erectile dysfunction is associated with age, it is still considered abnormal,
and patients with erection difficulties should be adequately evaluated for all potential
causes.
Quiz: A 70 year old man is prescribed terazosin for his benign prostatic hyperplasia. How
does the drug treat his condition, and what other medical condition does its mechanism of
action address?
Ans: Alpha blockers such as terazosin act on smooth muscle in the prostate, bladder neck,
and urethra. They also act on vascular smooth muscle, causing vasodilation; therefore,
they can work to lower HTN as well.
Quiz: A 41 year old woman with woman with no significant medical history comes to
your clinic for her first checkup. Her mother has type 2 DM. Her PE findings, including BMI,
are normal. Which screening tests might you recommend?
Ans: A Pap smear and HTN screening. A diabetes workup (fasting glucose test, HbA1c) is
not needed as the patient is under 45 years of age with a normal BMI. Given the patient's
age, a screening mammogram is controversial. It is important to discuss the risks, benefits,
and alternatives of screening before proceeding.
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
[+254707240657] o Your Success is Our Mission!
o For online exams and tutor expert, please whatsapp me
in the number given.
