I have studied your case
There is possibility of enlarged lymph node
Enlarged lymph node in shoulder is very common condition and needs proper evaluation.
Most common reason for enlarged lymph node is usually infection, so we can start antibiotic regime and look for results.
There is enlarged lymph node in malignancy also.
If there is no improvement then we will need to investigate in form of complete blood count
, ESR, CRP, tuberculin test, and Fine needle aspiration cytology or open biopsy
There could be possibility of infection like Tuberculosis
So I will advise you to consult a specialist and do further investigation.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.