[Ethmoid labyrinth cancer with extension into the orbital cavity].

Primary squamous cell carcinoma of the orbit is rare, as this area does not have its own squamous epithelium. Tumors of this localization are caused either by the germination of the primary focus located on the skin of the face or in the paranasal sinuses, or by the spread of the tumor through perineural invasion. The difficulty of surgical treatment of this localization is that with standard access it is often impossible to visualize the posterior edge of the resection, which, in turn, can lead to a recurrence of the tumor process. Our center uses the endonasal access technique, which facilitates satisfactory visual control of the posterior edge of the resection, and also avoids incisions on the face. This article describes a clinical case of cancer treatment of the ethmoid labyrinth.