Cavernous Sinus Metastasis of Leiomyosarcoma with Orbital Extension along the Third Nerve, Mimicking Cavernous Sinus Meningioma

Leiomyosarcoma (LMS) metastasis in the central nervous system is extremely rare. Metastatic LMSs have been described in the orbit, meninges, and skull base, however there are no reports of LMS metastasis into the cavernous sinuswith primary origin from lower extremity and long silent disease period of 7 years..