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Radiotherapy for parotid cancer
L M Toonkel1, S Guha, P Foster
1Department of Radiation Oncology, Mount Sinai Comprehensive Cancer Center, Miami Beach, Florida 33140.
Annals of Surgical Oncology
|November 1, 1994
Summary
Postoperative radiotherapy after parotid cancer surgery significantly improves local control rates. This treatment approach offers excellent survival outcomes with manageable toxicity for patients with parotid gland malignancies.
Area of Science:
- Oncology
- Radiation Oncology
- Surgical Oncology
Background:
- Parotid malignancies are diverse tumors often treated with surgery.
- High recurrence rates after surgery necessitate adjuvant therapies.
- Postoperative radiotherapy is considered for high-risk parotid cancer patients.
Purpose of the Study:
- To evaluate the efficacy of radiotherapy in managing parotid gland cancers.
- To assess treatment outcomes based on surgical and radiotherapy parameters.
- To determine the role of radiotherapy in different clinical scenarios of parotid cancer.
Main Methods:
- Retrospective review of 68 patients treated with megavoltage therapy (1966-1989).
- Patients categorized into three groups: post-gross total removal, post-incomplete excision/positive margins, and post-surgical recurrence.
- Analysis of local control, distant metastasis, and survival rates based on treatment groups and radiation doses.
Main Results:
- Group I (post-gross total removal): 2/41 local recurrences, 2/41 distant metastases.
- Group II (post-incomplete excision): 2/10 local failures, 3/10 distant metastases.
- Group III (post-recurrence): 9/17 local control, 4/17 distant dissemination.
Conclusions:
- Surgical excision combined with regional radiotherapy yields excellent local control and survival for parotid cancer.
- Adjuvant radiotherapy is crucial for patients with residual disease or recurrence.
- Aggressive treatment strategies, including chemotherapy or altered fractionation, are recommended for advanced cases.