Ultrasound:solitary lymph node submental region.there for 2 weeks.no other symptoms.a little soft on touch.smoker.how long before it goes away?cancer?

Might not.: I'm not sure what you mean by "soft on touch". Being a smoker, I'm sure this is worrisome; however, an ultrasound (or CT scan) gives only limited information. It may be a scar from a prior infection (viral bronchitis), or a lymph node from existing infection, or cancer. The only way to tell is to perform a biopsy. Subsegmental means it may be too far away for bronchoscopy or CT-guided biopsy. TTYD