I had ultrasound on jugulodigastric lymph node that measured at its greatest at 3.5cm but then i had a ct scan that said no lymphodenpathy. why would ct say i had no swollen lymph nodes when the ultrasound measured it so large and is that considered enlar

Not nodal: A 3.5 cm node in the jugulo- digastric muscle region is near the posterior belly of the digastric and should easily be palpable. There are 2 structures there that are not nodal,that is the tail of the parotid and a portion of the submaxillary gland. These can be mistaken for a node on US but overlooked as part of normal anatomy on CT.

A Good clinical exam: ....Exam will help. This node can be easily palpated by any experienced doctor. Unless the physical exam shows presence of an enlarged node in this area, I am inclined to disregard the Ultrasound(report),which can often give false abnormalities. I would rely on doctors hands first and foremost. The imaging test of choice would be CT scan of the neck.

It enlarged: Check with your primary doc to clarify discrepancy, obviously you imply on the same areas. Your lump should be investigated,Now.