Match each patient's clinical presentation with the most appropriate initial diagnostic laboratory test to order.
- A 19-year-old man presenting with severe sore throat, fever, profound fatigue, and posterior cervical lymphadenopathy.Heterophile antibody assay
- A 32-year-old woman presenting with a new-onset erythematous rash across her cheeks and nose, accompanied by wrist and hand arthralgias.Antinuclear antibody (ANA) screening
- A 68-year-old man complaining of progressive fatigue, mucosal pallor, and an unusual craving to chew on ice cubes.Serum ferritin level
- A 26-year-old woman presenting with a two-week history of missed menses, morning nausea, and bilateral breast tenderness.Urine beta-human chorionic gonadotropin (hCG)
Cevap
The presentations match as follows: The 19-year-old with pharyngitis matches to the heterophile antibody assay. The 32-year-old with a malar rash matches to ANA screening. The 68-year-old with pica matches to a serum ferritin level. The 26-year-old with missed menses matches to a urine beta-hCG test.
Each clinical scenario represents a highly characteristic presentation of a common condition that requires a specific initial laboratory evaluation. The 19-year-old with pharyngitis and adenopathy has clinical signs of infectious mononucleosis, evaluated with a heterophile antibody test. The 32-year-old with a malar rash and arthralgia displays classic signs of systemic lupus erythematosus, requiring an ANA screen. The 68-year-old with pica and fatigue has symptoms of iron deficiency anemia, diagnosed by assessing iron stores via ferritin. The 26-year-old with missed menses has a suspected pregnancy, requiring a beta-hCG test.
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Anahtar Kavram
Targeted initial diagnostic laboratory testing should be directly guided by the classic clinical hallmarks of the patient's presentation.