Squamous cell carcinoma of the temporal bone: A report of 103 cases from a single institution

Squamous cell carcinoma（SCC）of the temporal bone is extremely rare, making it difficult to establish standard treatment guidelines. In this report, we reviewed the records of 103 temporal bone SCC patients treated between 1999 and 2018 at Kyushu University Hospital. The primary diseases were classified as T1 in 13 pa-tients, T2 in 19 patients, T3 in 21 patients and T4 in 50 patients. The disease-specific survival rate was 92％ in T1, 87％ in T2, 87％ in T3 and 37％ in T4. Generally advanced temporal bone SCC has a poor survival rate. However, resection with a tumor-free surgical margin significantly improved patient survival even in advanced cases. Thus, radical surgery with a tumor-free margin could be a standard therapy even for cases of advanced temporal bone SCC.