Bee

A "normal" thymus, in an adult should be roughly the size of a walnut. An enlarged thymus (thymic hyperplasia), can be excessively huge. Mine, upon trans sternal thymectomy was, 4" by 5". A man in our local MG support group's was 5" by 11" !!!! Depending on the size of the thymus, the location and other medical conditions, I would say that it would cause visible swelling.

Lisa

***Just my opinion***