welcome to healthcare magic,
if ct scan
has picked up a nodule in your lymph node, then you need to first rule out cancer by doing tumor markers.
if you are female then you need to get ur ovaries and uterus
checked up for cancer.
you need to get your thyriod gland checked up by ultrasound
and function test to rule out the cause of the hoarseness
if the tumor markers are negative then you need to rule tuberculosis
and if possible get a fine needle aspirate done to know what is nodule.
you should be seen by the physician for further follow up.
hope to have answered your query
wish you all the best.