“…[6][7][8] The most common site of involvement is the superior aspect of the nasal cavity (approximately 79% of cases) with a predominance of the left side, followed by, in decreasing order of frequency, the paranasal sinuses, orbit, nasopharynx, pharyngeal wall, skull base, cribriform plate, and anterior cranial fossa. 1,6,7,[9][10][11] Nevertheless, rapid growth and extensive local destruction with direct extension into adjacent structures are frequently encountered at the time of diagnosis, and the site of origin cannot be determined in some cases. 1,6 Although TCS shows a predilection for the sinonasal tract, in rare cases, tumors showing features resemble TCS have been reported to arise primarily in the thyroid gland and oral cavity.…”