This document discusses lymphadenopathy (enlarged lymph nodes) in different age groups and contexts. In children under 10, it may present as a painful lump below the jaw and cause breathing difficulties or infections. In young and elderly patients, it causes neck pain and difficulty swallowing. Hodgkin's lymphoma commonly affects children, young adults and causes weight loss and itching. Head and neck cancers in older adults over 50 may cause symptoms related to the specific organ affected but do not typically cause anorexia or weight loss. Laboratory tests and biopsy of lymph nodes are important for diagnosis, and imaging can help identify underlying causes like tuberculosis or occult lung tumors.