A 15-year-old male presents to the clinic with fatigue,weakness,and sore throat for 4 days.The patient has no significant medical or surgical history.On physical examination,there is fever of 102,erythematous pharynx and tonsilar enlargement,and prominent cervical lymphadenopathy.Heart has regular rate and rhythm.Lungs are clear to auscultation.Abdomen exam demonstrates left upper quadrant tenderness to deep palpation and splenomegaly.Extremities show no significant findings.No neurological deficits.These signs and symptoms are characteristic of:

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The patient's symptoms of fatigue, weakness, sore throat, and lymphadenopathy, along with physical exam findings of pharyngeal erythema and tonsillar enlargement and splenomegaly, are classic for infectious mononucleosis. The fever, left upper quadrant tenderness, and absence of neurological deficits further support this diagnosis. Beta-hemolytic streptococcal infection and scarlet fever may present with similar symptoms, but the absence of a rash and the presence of splenomegaly are more characteristic of infectious mononucleosis. Human immunodeficiency viral infection can present with similar symptoms, but typically has a longer prodrome and would not present acutely over just 4 days.

A 15-Year-Old Male Presents to the Clinic with Fatigue,weakness,and Sore