i have a painless swollen lymph node on my left neck.  I think it is in the posterior cervical area.  I am not sick and am under curam antibiotics now given by doctor.  It has been one week and the swell seems the same.  Any cause for concern?  is it most definitely cancer since it is in the posterior cervical area?
Hi this is Chat Doctor. Thanks for the opportunity to help you. Presence of one painless lymph node in the posterior triangle of neck doesn't have to be cancer always and that to as per your description it has only lasted for one week. Some additional information will be beneficial like your age, sex, smoker or alcoholic and bit of elaboration of your symptoms like history of sore throat, fever, weight loss, evening rise of temperature. Weight loss (T. B, Malignancy)should be significant more than 10 kg in 6 months, any scalp infection like seborrhea dermatitis and lastly malignancy