causes of lumps on the neck mononucleosis information mount sinai sore throat tonsillitis symptoms tonsillitis information mount sinai how do you know you have strep throat strep throat causes symptoms treat swollen lymph nodes in neck naturally swollen glands symptom evaluation uc san go s practical guide to enlarged cervical lymph nodes lymph node biopsy call fort worth ent how to reduce lymph node swelling 3 what causes neck lymph node pain