ECTOPIC HAMARTOMATOUS THYMOMA - A CASE-REPORT WITH LITERATURE-REVIEW

The authors report an example of an unusual lower neck lesion, ectopic hamartomatous thymoma. Like other examples of this entity, the lesion was well marginated and characterized by cysts lined by squamous epit helium, adipose tissue, and spindle cells. The lesion was initially mi staken for a malignant neoplasm (at the time of frozen section) and th e correct interpretation was rendered upon review of the permanent sec tions. They review the literature and clinicopathologic differential d iagnosis of this entity.