1. A 60-year-old presents with a pearly, telangiectatic papule located directly on the nasal ala. The FNP determines a diagnostic biopsy is necessary.
Answer: D
A tangential shave biopsy is ideal for a pearly, telangiectatic papule, which strongly suggests a basal cell carcinoma. Because this lesion is raised and located on the cosmetic nasal ala, a shave biopsy provides adequate tissue for pathology while minimizing scarring. Option A is incorrect because a deep punch biopsy on the nose can cause unnecessary full-thickness defects and cartilage damage. Option B is suboptimal because just taking the central area might miss the diagnostic margins of the raised lesion. Option C is inappropriate because a wide excisional biopsy is too aggressive for an initial diagnostic step on the face before confirming malignancy. By removing the raised portion tangentially, you secure the needed epidermis and upper dermis while allowing the site to heal with excellent cosmetic results.
2. A 28-year-old male reports a dull ache in his scrotum. Examination reveals a right-sided paratesticular mass that feels like a "bag of worms" and does not decompress when supine.
Answer: C
A right-sided varicocele that does not decompress when the patient is supine raises high suspicion for inferior vena cava obstruction, potentially from a retroperitoneal mass or renal cell carcinoma. The appropriate diagnostic step is ordering an abdominal and pelvic computed tomography scan to evaluate the retroperitoneum. Reassuring the patient (Option A) ignores the red flag signs of a non-compressible, right-sided lesion. Referring for routine varicocelectomy (Option D) is premature without ruling out a secondary malignant cause. Performing a diagnostic aspiration (Option B) is contraindicated and inappropriate for a vascular structure like a varicocele.
3. A 78-year-old patient presents with a right-sided lower facial droop. During the cranial nerve exam, the FNP notes the patient can wrinkle their forehead bilaterally without difficulty. Which conclusion is most supported by this specific focused physical examination finding?
Answer: A
Sparing of the upper face, demonstrated by the ability to wrinkle the forehead, indicates a central upper motor neuron lesion such as a stroke. This occurs because the upper face receives bilateral cortical innervation, allowing the unaffected hemisphere to compensate. A peripheral lower motor neuron lesion (Options B and D), such as Bell's palsy, affects the facial nerve after it exits the brainstem, resulting in paralysis of the entire half of the face, including the forehead. The facial nerve (CN VII) controls facial expression, while the trigeminal nerve (CN V) (Option C) provides facial sensation and controls the muscles of mastication.
4. A 60-year-old man asks about a bright red, raised, 3-millimeter papule on his chest. The focused physical exam reveals a perfectly symmetrical shape with a smooth, sharply defined border and no reported recent changes. What is the most appropriate next step in managing this patient?
Answer: C
When performing a focused skin assessment, it is just as important to confidently identify benign lesions as it is to catch malignancies. This patient presents with a bright red, raised, 3-millimeter papule that is perfectly symmetrical with a smooth, sharply defined border. These features completely lack the ABCDE warning signs for melanoma and are classic for a cherry angioma, which is a completely benign vascular lesion. Therefore, reassuring the patient is the most appropriate action. Option A and Option B are incorrect because invasive procedures like punch biopsies or urgent excisions are unnecessary and inappropriate for a clearly benign vascular finding. Option D is incorrect because a topical corticosteroid will not resolve a vascular proliferation like a cherry angioma and exposes the patient to unnecessary medication side effects.
5. A 50-year-old female presents to the clinic with right-sided facial weakness that began this morning. She is unable to close her right eyelid and her right mouth corner droops when smiling. Neurological exam reveals normal strength in all four extremities and intact speech.
Answer: D
Involvement of both the upper and lower face without other focal neurological deficits is the hallmark of a lower motor neuron lesion affecting cranial nerve VII. Because this patient is unable to close her eyelid and has a drooping mouth corner, the entire hemiface is affected, pointing to a peripheral facial nerve neuropathy. A cortical ischemic cerebrovascular accident would typically spare the upper face and might include aphasia or hemiparesis. An acute brainstem infarction syndrome could cause peripheral facial palsy but would almost certainly present with crossed neurological signs, such as contralateral body weakness or ataxia. A trigeminal nerve inflammatory disorder causes severe facial pain and sensory deficits, not primary motor paralysis. The isolated, complete unilateral facial weakness confirms a peripheral origin.
6. A 22-year-old male presents with a palpable left scrotal mass. The scrotal ultrasound reveals a 2-centimeter cystic lesion located entirely superior to the left testicle.
Answer: D
The ultrasound findings describe an extra-testicular cystic lesion located at the epididymal head, which is highly characteristic of a benign spermatocele. Because it is extra-testicular and cystic, it carries virtually no risk of malignancy, making reassurance the correct management. Referring for urgent radical orchiectomy (Option A) is incorrect because the mass is not a solid intra-testicular tumor. Ordering serum tumor markers (Option B) is unnecessary for a clearly benign, fluid-filled extra-testicular cyst. Prescribing doxycycline (Option C) is inappropriate because there are no clinical or sonographic signs of epididymitis.
7. A 68-year-old female presents with a painless lesion on her chest. Examination reveals a well-demarcated plaque with a waxy, verrucous surface and a stuck-on appearance. The lesion contains multiple colors including brown and black. Which of the following is the most appropriate action?
Answer: B
This presentation is classic for a seborrheic keratosis, which is a common benign epidermal tumor in older adults. Despite having multiple colors—a feature that often mimics melanoma—the stuck-on appearance and waxy texture strongly differentiate it as benign. Therefore, reassurance is the best approach. An excisional or punch biopsy is unnecessary and exposes the patient to unwarranted scarring and risk. Topical fluorouracil is indicated for precancerous actinic keratoses, which present as gritty, erythematous macules, not waxy plaques.
8. A 19-year-old male taking valproic acid for seizures is starting lamotrigine as adjunctive therapy. He reports a new diffuse maculopapular rash on his trunk. Which action is most appropriate?
Answer: B
Lamotrigine carries a black box warning for severe skin reactions like Stevens-Johnson syndrome. This risk is significantly higher when co-administered with valproic acid due to decreased lamotrigine clearance. Any new rash requires immediate discontinuation of the offending agent. Option A is dangerous because it masks potentially life-threatening symptoms while the reaction progresses. Option C does not address the immediate danger of the rash, as the lamotrigine is the primary culprit for the dermatologic emergency. Option D is inappropriate because the rash may rapidly progress to a life-threatening condition and should never be dismissed as transient.
9. A 32-year-old woman with multiple uniform light brown nevi presents for a skin check. The nurse practitioner notes one 4-mm dark asymmetrical macule on her back. The patient reports a new onset of mild pruritus at the site. What is the most appropriate action?
Answer: B
The ugly duckling sign refers to a lesion that looks distinctly different from the patient's other nevi, which significantly raises the suspicion for melanoma. When combined with an asymmetrical macule and the new onset of mild pruritus, the clinical picture strongly demands an excisional biopsy to evaluate the entire depth and margins of the lesion. Measuring the lesion and reevaluating in six months (A) is dangerous and inappropriately delays the diagnosis of a potential malignancy. Reassuring the patient because the lesion is small (C) is a common pitfall; melanomas can certainly be smaller than the classic 6-mm threshold, especially when other warning signs are present. Prescribing a topical corticosteroid (D) merely masks the symptom of itching while allowing a potentially life-threatening skin cancer to progress unchecked.
10. A 32-year-old female with a history of multiple dysplastic nevi presents for a routine skin check. One specific lesion on her thigh is smaller than the others and uniformly dark brown, but it looks completely different from her other moles. Which of the following is the most appropriate action?
Answer: C
The ugly duckling sign is a highly sensitive clinical concept indicating that a lesion stands out as completely different from the patient's background nevi. Even if a lesion is small and uniformly colored, being an outlier makes it highly suspicious for melanoma, warranting an excisional biopsy. Reassuring the patient or waiting a year is unsafe because early detection is critical for melanoma survival. A shave biopsy is contraindicated for suspected melanoma because it risks transecting the tumor and compromising accurate depth measurement.
11. A 71-year-old patient is evaluated for a suspected transient ischemic attack. The patient feels pinprick on each side individually but ignores the left side during simultaneous stimulation of both arms. Which specific neurological pathway or region is most likely impaired based on this finding?
Answer: C
The phenomenon described is sensory extinction, which occurs when a patient can perceive a stimulus applied to one side alone but fails to perceive it on the affected side when both sides are stimulated simultaneously. This finding indicates a cortical lesion, typically in the contralateral parietal lobe. Peripheral tracts like the spinothalamic tract (Option A) or dorsal columns (Option D) carry primary sensory information; lesions here would cause an inability to feel the individual pinprick entirely. The primary motor cortex (Option B) controls voluntary movement, and a lesion there would cause weakness rather than sensory inattention.
12. A 16-year-old female presents with sudden onset of severe inflammatory acne along the jawline and lower cheeks. During the clinical interview, she reports irregular menstrual cycles every 45 to 60 days.
Answer: B
The combination of sudden-onset jawline acne and oligomenorrhea strongly suggests underlying hyperandrogenism, such as polycystic ovary syndrome (PCOS). Assessing for hirsutism provides further clinical evidence of androgen excess. Evaluating for excoriations would assess for acne excoriée, which does not explain the menstrual irregularity. Cervical lymphadenopathy and tinea versicolor are unrelated to the hormonal cues presented in this specific clinical scenario.
13. A 30-month-old child presents with a low-grade fever and a new rash. Examination reveals non-pruritic grayish vesicles strictly localized to the palms, soles, and lateral buttocks.
Answer: B
The presence of grayish vesicles strictly localized to an acral distribution is the hallmark presentation of classic hand, foot, and mouth disease. This specific morphology and location confirm the primary diagnosis. Atypical varicella zoster virus skin infection presents with highly pruritic, fluid-filled vesicles that erupt in successive crops, typically beginning on the trunk and face rather than being confined to the extremities. Bullous impetigo localized bacterial skin infection features large, fragile bullae that easily rupture to form honey-colored crusts, unlike these discrete, intact grayish vesicles. Erythema multiforme minor allergic skin reaction presents with classic targetoid lesions featuring three distinct color zones, often triggered by a preceding herpes simplex infection, rather than simple vesicles on the palms and soles. Identifying the exact lesion morphology prevents misdiagnosis of this common viral exanthem.
14. A 75-year-old male with a history of multiple actinic keratoses returns for evaluation of a lesion on his bald scalp. Previously diagnosed as a flat scaly patch, it has recently become a tender, elevated, and thick hyperkeratotic plaque that bleeds when scratched. Which of the following is the most appropriate action?
Answer: D
A history of actinic keratosis places this patient at high risk for malignant transformation. The critical change from a flat scaly patch to a tender, elevated, and thick plaque that bleeds easily is highly suspicious for progression to squamous cell carcinoma. Reassuring the patient or simply prescribing topical fluorouracil is inappropriate because these new high-risk features demand a tissue diagnosis to rule out invasive disease. While basal cell carcinoma is a common skin cancer, it rarely arises from an actinic keratosis and typically lacks this hyperkeratotic, thick presentation. Therefore, a biopsy is the essential next step to definitively evaluate for squamous cell carcinoma.
15. A 65-year-old patient presents with a unilateral, grouped vesicular rash on an erythematous base. The physical exam shows the rash follows the right T4 dermatome and stops abruptly at the midline. Which physical exam technique best confirms the extent of the sensory nerve involvement?
Answer: A
Herpes zoster is a neuropathic infection that causes inflammation along a specific sensory nerve root. The classic presentation is a unilateral rash that stops at the midline. Option A is correct because performing a focused neurological exam to map sensory changes, such as hyperesthesia or decreased sensation, directly evaluates the function of the involved dermatome and establishes a baseline for monitoring potential complications. Option B is incorrect because a bacterial culture is only indicated if secondary bacterial infection is suspected, which is not described here. Option C is incorrect because the clinical presentation is classic for shingles; a biopsy is unnecessarily invasive and rarely needed for diagnosis. Option D is incorrect because deep tendon reflexes assess motor and sensory pathways primarily in the extremities, which does not directly evaluate a thoracic dermatome.
