Thyroid Carcinoma and Secondary Malignancy of the Sinonasal Tract

Occult Follicular Carcinoma Metastasizing to the Sinonasal Tract

“…Of the 5 known cases of thyroid métastasés in this region, épistaxis occurred in 2 [ 1,9] and profuse bleeding at biopsy in 3 [1,8,10]. Angiography clearly demonstrated a hypervascular mass in our case.…”

“…Many of those tumors are from richly vascularized organs [5], Although the thyroid is also richly vascularized and there is a history of frequent blood-borne métastasés from follicular thyroid carcinoma [6,7], thyroid métastasés to the sinonasal tract are surprisingly rare. Including this case, we know of only 5 proven instances of thyroid metastasis to the sinonasal tract [1,[8][9][10] (table 1). In the 4 previously reported cases, the thyroid gland was not his tologically examined.…”

Photodynamic therapy with topical 5‐aminolevulinic acid as a post‐operative adjuvant therapy for an incompletely resected primary nasopharyngeal papillary adenocarcinoma: A case report

“…Thus it is necessary to exclude the possibility of nasopharyngeal metastasis from other sites of the body before the treatment is started. Papillary adenocarcinoma of the thyroid gland is the first that needs to be ruled out because histologically both nasopharyngeal and thyroid papillary adenocarcinomas show similar papillary and glandular growth patterns, vesicular nuclei, and focal psammoma body formation [13]. Besides, occult thyroid papillary adenocarcinoma with obvious metastases are not uncommon and images studies do not exclude very small cancer focus in the thyroid gland [14][15][16][17].…”

Papillary Thyroid Carcinoma Metastasizing to the Sphenoid-Ethmoid Sinuses and Skull Base

“…Bernstein et al described one case of thyroid cancer metastasizing to the sphenoid sinus, and another to the frontal sinus; however, the types of thyroid carcinoma were not noted. Since then, there has been one case of metastases to the maxillary sinuses (4), and four to the sphenoid sinuses (5-7). More recently Yamasoba et al described thy¬ roid métastases to the sinonasal tract (8).…”