Hello and welcome to HCM
The neck region (near the collar bone) has a large number of lymph nodes.
Any swelling in this region can be a lymph node enlargements.
Malignancy of lymph node ie lymphoma
is not usually painful but involvement of nerve
can cause pain.
Since you have afamily history of lymphoma, it has to be ruled out by some investigations.
A FNAC (Fine needle aspiration cytology) needs to be done. In this procedure cells are sampled with a needle and are seen under the microscope.
If malignant cells are present firther excision is done and histopathological examination is done. Histopathological examination characterises the type of lesion.
Since you have a history of melanoma
in the past, melanoma can reccur as it is an aggresive tumor
and can metastasize to lymph node.
FNAC will give information about the type of cells in the lymph node.
The pain associated with the enlargged lymph nodes indicates some kind of inflammation.
Infection in the head and neck region often cause enlargement and pain in the local lymph nodes in the region.
Consult your doctor for investigation.
Next step/ investigation will be decided subsequently.
Thanks and take care
Dr Shailja P Wahal