Hyalinizing Trabecular Adenoma of Thyroid Gland

ABSTRACT

Hyalinizing trabecular adenoma of the thyroid gland is a distinctive benign epithelial lesion exhibiting a prominent trabecular arrangement and stromal hyalinization. We recently recognized a hyalinizing trabecular adenoma of the thyroid that displayed potentially misleading features of papillary and medullary carcinomas. However the immunohistochemical features, i.e. thyroglobulin-positive and calcitonin-negative as well as its trabecular arrangement and surrounding abundant hyaline materials confirmed our diagnosis.