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:
A. Beta-hemolytic streptococcal infection
B. Scarlet fever
C. Infectious mononucleosis
D. Human immunodeficiency viral infection
ANS: C
Mononucleosis is a viral infection that typically occurs in adolescence and early adulthood and is caused by the Epstein-Barr virus. Fatigue is a common complaint. Fever, sore throat, prominent cervical lymphadenopathy, and splenomegaly are characteristic of infectious mononucleosis.
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