Thank you for the consult:
Yes, the swelling appears to be benign. The features you have mentioned are typical of a non-malignant swelling. But unless confirmed by a biopsy, a diagnosis of “Peripheral Nerve tumour “is more fitting than Schwannoma. Schwannoma is one among the many peripheral nerve tumours. Majority of the schwannomas are benign for the record.
If you wish for a definitive diagnosis a MRI and Biopsy can help. But again a small unchanged swelling for years can be left alone. You can observe for any increase in size of the swelling, Also in case if you develop any neurological symptoms like persisting tingling sensation, weakness in the fingers, or loss of sensation over the arms you will need to consult a Surgeon for further evaluation
Hope this helps