Hello welcome to health care magic You didn t mention about the characteristics of lump.whether any change in the size recently..any symptoms because of the existing lump? You didn t mention about your age..younger or old age.. What is the exact location of lump in the neck or above the clavicle bone.. In older age people,,in abdominal cancers there will be swelling in the supraclavicular fossa(above the clavicle bone) ..or may be infection in and around the oral cavity.. But if you are in middle age then the sweeling ,may be a lipoma or just a inflamed lymphnode.. Most common lump is lipoma..it is soft, freely mobile painless ,nontender,skin can be pinch-able from the swelling.. Instead of going for ultrasound,,better go for FNAC(fine needle aspiration cytology)by pathologist it will clearly tell the exact diagnosis whether it is a metastatic lymphnode.or lipoma,or just a inflamed node.. If you have productive cough of more than 3 weeks duration then it may be a tuberculous lymphnode also.. Hope you understand my suggestion and answer consult pathologist 1st Thank you Dr.siddartha