Oncology Questions? Ask an Oncologist for Answers ASAP
This is Dr. David
I see you are 43 years old
this sounds like a benign lymph node which can swell up from time to time due to inflammation in the shoulder or arm.
it doesn't sound like a cancerous lymph node.
you can ask your doctor for an ultrasound of your shoulder to look at that area.
it could even be a benign synovial cyst or bursitis in your shoulder which you are feeling which can swell up from time to time.
let me know if you have questions.