Hi,
Itching can indeed be a sign of lymphoma. However, itching is usually caused by other more common, benign, causes.
The fact that you do not have any enlarged lymph nodes, no fever, no weight loss, and no night sweats are all good signs. Another comforting factor is the fact that your CT chest and abdomen are normal. Thus we can be reasonably sure that you currently have no evidence of lymphoma.
You have educated yourself well about the early signs and symptoms of lymphoma. Please keep a lookout for these, and see a doctor if in doubt. But don't worry too much about it.
You can continue to visit an allergy specialist, internist, or dermatologist for this complaint. The treatment for pruritus is long and not always successful.
I wish you all the very best!
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