Diffuse Sclerosing Variant Thyroid Gland Papillary Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A morphologic variant of papillary carcinoma of the thyroid gland that more often affects young patients and commonly metastasizing to the lungs. It is characterized by a diffuse infiltration of the thyroid gland by malignant follicular cells, squamous metaplasia, stromal fibrosis, and lymphocytic infiltration.

**Synonyms:** - Nonencapsulated Sclerosing Adenocarcinoma - Nonencapsulated Sclerosing Carcinoma - Nonencapsulated Sclerosing Neoplasm - Nonencapsulated Sclerosing Papillary Thyroid Carcinoma - Nonencapsulated Sclerosing Tumor - Nonencapsulated sclerosing adenocarcinoma - Nonencapsulated sclerosing carcinoma - Nonencapsulated sclerosing tumor - Thyroid Gland Diffuse Sclerosing Papillary Carcinoma