hi..i had this lump at my neck which i noticed a month ago..dr suspected that i have tiroid but the blood test result come out normal. then i did my ultrasound yesterday..and the result is as follows:  right tiroid gland measures at 15.8mmX11.5mmX18.3mm.  there is a nodule at the right side of the isthmus extending to the right midpole. it has both solid(19.8mmX8.3mmX16.22mm) and semi-solid(not purely cystic) component, measures 28.9mmX11.2mmX26.2mm. No retrosternal extension. Increased flow noted. Does not extend to the submental region.  can someone explain to me whether it is dangerous?