1. Treatment results of post-operative radiotherapy in patients with salivary duct carcinoma of the major salivary glands
- Author
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Shin Hs, Seung Do Ahn, So Yeon Kim, Jung Hyuk Kim, Seung Hong Choi, Nam Sy, Roh Jl, Sei Kyung Chang, Eun-Kyung Choi, Song Sy, Jin Young Kim, Suk-Koo Lee, and Cho Kj
- Subjects
Adult ,Male ,medicine.medical_specialty ,Lymphovascular invasion ,medicine.medical_treatment ,Perineural invasion ,Malignancy ,Gastroenterology ,Disease-Free Survival ,Salivary duct carcinoma ,Internal medicine ,Major Salivary Gland ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Aged ,Retrospective Studies ,Postoperative Care ,Full Paper ,business.industry ,Neck dissection ,General Medicine ,Middle Aged ,Salivary Gland Neoplasms ,medicine.disease ,Parotid gland ,Surgery ,Radiation therapy ,Treatment Outcome ,medicine.anatomical_structure ,Lymphatic Metastasis ,Neck Dissection ,Female ,Radiotherapy, Adjuvant ,Neoplasm Recurrence, Local ,business - Abstract
Salivary duct carcinoma (SDC) is a rare malignancy of high-grade pathological type. We evaluated clinical outcomes and prognostic factors in 35 patients with SDC treated post-operatively with adjuvant radiation.We retrospectively assessed overall survival, locoregional control and disease-free survival in 35 patients with SDC of the major salivary glands who underwent surgery and were subsequently treated with radiotherapy. The evaluated prognostic factors included gender, age, symptom duration, tumour site, tumour size, TNM classification, and the following pathological features: perineural invasion, lymphovascular invasion, extraparenchymal invasion and resection-margin status.Of the 35 patients, 30 (85.7%) were male. Median age at initial diagnosis was 62 years (range 38-75 years). The parotid gland was the main site affected in 22 patients (62.9%). 18 patients (51.5%) had pathological T3/T4 tumours, and 26 (74.3%) showed pathological nodal involvement. Actuarial 5-year locoregional control, disease-free survival and overall survival rates were 63.3%, 47.4% and 55.1%, respectively. The cause-specific death rate was 31.4% (n=11). Pathological nodal involvement was correlated with distant metastasis (p=0.011). Lymphovascular invasion was significantly prognostic for distant metastasis-free survival (p=0.049), locoregional control (p=0.012) and overall survival (p=0.003) in a Cox proportional hazard model, whereas perineural invasion was only significantly prognostic for overall survival (p=0.005).Surgery and post-operative radiotherapy were effective for locoregional control. Lymphovascular invasion and perineural invasion were significant prognostic factors in patients with SDC.
- Published
- 2012