ESPE Abstracts

Introduction: Long-standing primary hypothyroidism is an unusual cause of pituitary hyperplasia (PH) in children, sometimes difficult to distinguish on CT or MRI from primary pituitary tumors. Loss of thyroxine feedback determines overproduction of thyrotropin releasing hormone (TRH) and subsequent TSH-releasing cells hyperplasia in the anterior pituitary. Levothyroxine replacement therapy has been shown to usually determine regression of PH.<p class="abst...