Upon examining a patient with mononucleosis, which finding is likely?

Mononucleosis, often caused by the Epstein-Barr virus, is characterized by several hallmark signs and symptoms that reflect the body’s immune response. One of the distinctive features of this disease includes increased temperature due to infection, as the body mounts a fever in response to the viral presence.

Moreover, lymphadenopathy, or enlarged lymph nodes, is a common finding in mononucleosis due to the activation of lymphocytes as part of the immune response. The spleen, being part of the lymphatic system, may also become enlarged, leading to splenomegaly. This combination of increased body temperature, enlarged lymph nodes, and splenomegaly effectively captures the typical clinical picture seen in patients with mononucleosis, thus making it the most likely finding upon examination.

In contrast, the other symptoms listed in the other options do not align with the classic presentation of mononucleosis. Normal blood pressure and a lack of additional relevant symptoms do not reflect the systemic response to a viral infection. Likewise, a decreased heart rate with normal respiration and clear lungs does not capture the more acute and systemic manifestations of mononucleosis. Lastly, symptoms like swollen ankles, blurred vision, and headache are not primary or common