I wouldn't jump to that conclusion because lymph nodes can become enlarged for a variety of other reasons, most notably, infection. Swelling that comes on suddenly is usually due to infection, swelling that comes thru a long period is usually related to some form of cancer.
Please let me know if you have any further questions, or need more info.
Lisa
If this has helped, remember to click the green accept button. Please talk to me before leaving negative feedback, my goal is to get you best answers possible. If you find my help worthy, bonuses are appreciated!