“…Thymic hyperplasia has been previously reported in patients following chemotherapy, and in this context is referred to as thymic rebound [20][21][22][23][24]. Typically, thymic rebound, defined as a greater than 50% increase in thymic volume over baseline, has been seen within the first year following cessation of chemotherapy [25], but it may occur as late as 5 years after chemotherapy [21].…”