The large immobile supraclavicular lymph node is not likely related to the chronic sinusitis
.It is more sinister than that.She needs an urgent Chest consultation,Fine needle biopsy
of the node and a general surgical consultation to find some other lesion in the abdomen causing the hard node,esp.kidney and the digestive system.Aproper ENT check up is needed to rule out underlying malignancy in the sinuses
or upper respiratory tract
.A CT of the sinuses may be needed if in doubt.