alexa Outcomes and prognostic variables in adenoid cystic carcinoma of the head and neck: a recent experience.

Oncology & Cancer Case Reports

Author(s): Gomez DR, Hoppe BS, Wolden SL, Zhung JE, Patel SG,

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Abstract PURPOSE: To analyze the recent experience of patients with adenoid cystic carcinoma treated with radiation therapy at Memorial Sloan-Kettering Cancer Center. METHODS AND MATERIALS: From 1990 to 2004, a total of 59 patients with a diagnosis of primary adenoid cystic carcinoma of the head and neck received radiation therapy at our institution. The subsite distribution was oral cavity, 28\% (n = 17); paranasal sinuses, 22\% (n = 13); parotid, 14\% (n = 8); submandibular, 14\% (n = 8); oropharynx, 10\% (n = 6); sublingual, 3\% (n = 2); nasopharynx, 3\% (n = 2); and other, 5\% (n = 3). T Stage distribution was T1, 34\% (n = 20); T2, 19\% (n = 11); T3, 14\% (n = 8); and T4, 34\% (n = 20). Twenty-nine percent of patients (n = 17) were treated with intensity-modulated radiation therapy; 25\% (n =15), with three-dimensional conformal therapy, and the remainder, with conventional techniques. Ninety percent (n = 53) of patients received treatment including the base of skull. RESULTS: Median follow-up for surviving patients was 5.9 years. Five-year and 10-year rates of local control and distant metastases-free survival were 91\%/81\% and 81\%/49\%, respectively. Five-year and 10-year rates of disease-free and overall survival were 76\%/40\% and 87\%/65\%, respectively. On univariate analysis, stage T4 (p = 0.004) and gross/clinical nerve involvement (p = 0.002) were associated with decreased progression free survival, whereas stage T4 and lymph node involvement were associated with decreased overall survival (p = 0.046 and p < 0.001, respectively). CONCLUSIONS: Radiation therapy in combination with surgery produces excellent rates of local control, although distant metastases account for a high proportion of failures. Routine treatment to the base of skull reduces the significance of histologic perineural invasion, but major nerve involvement remains an adverse prognostic factor. This article was published in Int J Radiat Oncol Biol Phys and referenced in Oncology & Cancer Case Reports

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