Final answer:
The most likely diagnosis for Kenneth is Hodgkin lymphoma, as indicated by his symptoms and physical exam findings.
Step-by-step explanation:
Based on the information provided, the most likely diagnosis for Kenneth is Hodgkin lymphoma. Hodgkin lymphoma is a type of cancer that affects the lymphatic system, causing symptoms such as swollen lymph nodes, night sweats, and low-grade fever. In contrast, Non-Hodgkin lymphoma is a broader term that encompasses several types of lymphoma that are not Hodgkin lymphoma. Tuberculosis is an infectious disease caused by bacteria and usually presents with symptoms such as cough, weight loss, and fever. Infectious mononucleosis, also known as mono, is a viral infection that typically causes symptoms such as sore throat, fatigue, and swollen lymph nodes. While infectious mononucleosis can present with similar symptoms to Hodgkin lymphoma, the presence of enlarged supraclavicular nodes in Kenneth's case suggests a more concerning diagnosis.