Thyroid papillary carcinoma arising in ectopic thyroid tissue within sternocleidomastoid muscle: case report and review of current literature.

Thyroid papillary carcinoma arising in ectopic thyroid tissue within sternocleidomastoid muscle: case report and review of current literature. Minerva Endocrinol. 2020 Aug 03;: Authors: Barrea L, Fonderico F, Di Somma C, Pugliese G, De Alteriis G, Mascolo M, Colao A, Savastano S Abstract The prevalence of ectopic thyroid tissue as consequence of an aberrant migration of thyroid during embryogenesis ranges up to 10% in autopsy studies. The differential diagnosis between the relatively rare occurrence of a primary carcinoma arising in ectopic thyroid tissue and the more frequent presence of cervical lymph node metastasis from papillary thyroid carcinoma (PTC) might represent a difficult challenge in the clinical practice. The clinical relevance of these lesions lies in their risk of hidden primary thyroid cancer. Our intention is to provide review the current limited data available and to report an unusual localization of primary PTC arising from an extrathyroid area, responsible for a solitary cervical mass as initial manifestation. The tumor developed in an ectopic thyroid tissue embedded within the clavicular head of the sternocleidomastoid muscle and was completely separated from the thyroid. Surgical excision of ectopic thyroid tissue with clavicular head of sternocleidomastoid muscle along with total thyroidectomy and central and selective lateral neck dissection were carried out. Histopathology was diagnostic for ectopic PTC and...
Source: Minerva Endocrinologica - Category: Endocrinology Tags: Minerva Endocrinol Source Type: research