En Bloc Subtotal Temporal Bone Resection in a Case of Advanced Ear Cancer: 2-Dimensional Operative Video.

Temporal bone cancer is extremely rare; thus, the optimal surgical strategy for advanced tumors, en bloc vs piecemeal resection, remain controversial. Some authors have favored piecemeal resection and reported comparable outcomes.1 Other authors recommend the use of en bloc subtotal temporal bone resection (STBR) for advanced tumors and reported better outcomes, although long-term cancer control remains uncertain.2 Because of the technical difficulty and the lack of demonstrative surgical videos, STBR has not been sufficiently distributed. This video demonstrates en bloc STBR in a stepwise manner with particular focus on the neurosurgeon's role and aims to improve its safety, feasibility, and distribution. This video conforms to the description of Osawa et al3 in the designations for each segment of the petrous ICA. A 67-yr-old man suffered from consistent otorrhea and underwent tympanoplasty at an outside hospital 1 yr earlier. Following a histopathological diagnosis of squamous cell carcinoma in the specimen, he underwent chemoradiotherapy (cisplatin + 70 Gy). However, a current imaging revealed a recurrent tumor and he was admitted to our hospital for radical resection. Computed tomography revealed a disrupted external auditory canal and magnetic resonance imaging indicated a carcinoma equivalent to Pittsburg stage T3. The patient underwent radical STBR without complications. His postoperative course was uneventful. At 2 yr postoperative, his modified Rankin scale score was 1, no recurrence was noted, and his facial nerve function was restored to House-Brackmann Grade IV. This video was reproduced with informed consent from the patient.