Sinus squamous cell carcinoma

The orbit is almost surrounded by the sinuses, with the maxillary sinus below, the ethmoid sinus on the inside, the frontal sinus above, and the sphenoid sinus behind. In addition to the sphenoid sinus, the top of the maxillary sinus is the orbital floor, the ethmoidal cardboard of the ethmoid sinus is the inner orbital wall, and the 3/4 area outside the bottom of the frontal sinus is part of the orbital top. Separated. Tumors of the sinuses directly erode these thin bone plates to reach the orbits. At the same time, tumors can also enter the orbits through nerves and blood vessel channels on the bone plates. The lateral wall of the sphenoid sinus is closely related to the cavernous sinus and the carotid arteries. The III, IV, Ⅴ, and Ⅵ brain nerves pass between this wall and the dura mater. The anterior part of the upper wall is close to the left and right optic nerves and optic bundles. Therefore, sphenoid sinus tumors are often accompanied by extraocular muscle paralysis, trigeminal neuralgia and changes in visual function. Squamous cell carcinoma of the paranasal sinus occurs in all sinuses, but the maxillary sinus is most common. Squamous cell carcinoma is also the first in other sinus cavities.