Intrasellar rhabdomyosarcoma: Case report

OBJECTIVE AND IMPORTANCE: There has been only one reported case of an intrasellar rhabdomyosarcoma, the origin of which was in the paranasal sinus. The authors encountered a patient with an intrasellar rhabdomyosarcoma with no evidence of tumor at any additional sites. CLINICAL PRESENTATION: A 28-year-old otherwise healthy man complaining of headache exhibited left abducent nerve palsy and left visual disturbance. The patient was diagnosed as having a sellar tumor invading the left cavernous sinus. INTERVENTION: Near total removal of the tumor was achieved via a transsphenoidal approach. Histologically, the tumor was composed of small, round-to-elongated undifferentiated cells and large spindle cells with myoblastic features. Immunohistochemically, tumor cells were positive for antibodies against desmin, myoglobin, and alpha -smooth muscle actin. The tumor was identified as an embryonal rhabdomyosarcoma on the basis of the above pathological findings. Systemic investigation, including the nasal and paranasal regions, failed to detect any additional tumors. Postoperative local radiation therapy and chemotherapy with the use of ifosfamide, etoposide, and vincristine brought about complete initial remission. CONCLUSION: Rhabdomyosarcoma should be considered in the differential diagnosis of a primary intrasellar neoplasm.