difficult base of tongue cancer contouring: md anderson ... · difficult base of tongue cancer...
TRANSCRIPT
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Difficult Base of Tongue Cancer Contouring: MD Anderson Cancer
Center Nikhil G. Thaker, MD
Waqar Haque, MD
Adam S. Garden, MD
Head and Neck Radiation Oncology
2014
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BOT Cases
• Case: Induction chemotherapy chemoradiation therapy
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Case
• 46 year old male
• Unhealing dental extraction
• Developed odynophagia, trismus, right sided jaw pain, right neck mass
• CT Head and Neck imaging obtained:
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CT Head and Neck
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CT Head and Neck
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CT Head and Neck
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CT Head and Neck
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CT Head and Neck
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CT Head and Neck Findings:
• Heavy involvement of the right tongue base with extension into the extrinsic tongue musculature
• Involvement laterally to the right retromolar trigone and mandibular gingiva (with mandibular destruction of an extensive nature)
• Extension upward to involve the tonsillopharyngeal wall and up into the nasopharynx
• Lateral extension through the parapharyngeal space and into the masticator musculature
• Extensive ipsilateral necrotic nodal metastases and several contralateral nodal metastases
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Stage?
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AJCC Stage Descriptions
• T4a - invades larynx, deep/extrinsic muscles of the tongue, medial pterygoid, hard palate, or mandible
• T4b - invades lateral pterygoid, pterygoid plates, lateral nasopharynx, skull base, or encases carotid
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Stage: T4bN2c
• Treatment options:
– For N2-3 disease:
• Concurrent chemoradiation
• Induction chemotherapy followed by RT or chemoradiation
• Surgery for primary and neck
• Multimodality clinical trials
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Chemoradiation treatment plan
• Radiation treatment – 70 Gy in 33 fractions to gross disease and areas of previous
gross disease
– 60 Gy in 33 fractions to at risk areas
– Matched to low neck field:
– 40 Gy in 20 daily fractions with larynx block
– 10 Gy in 5 fractions with midline block
– 10 Gy in 5 fractions for right neck boost LAO/RPO
– 6 Gy in 3 fractions right low neck boost
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Matched to low neck field: – 40 Gy in 20 daily fractions AP/PA with larynx block
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Matched to low neck field: – 40 Gy in 20 daily fractions AP/PA with larynx block
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Matched to low neck field: – 10 Gy in 5 fractions with midline block
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Matched to low neck field: – 10 Gy in 5 fractions for bilateral boost
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Matched to low neck field: – 6 Gy in 3 fractions right low neck boost
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Thank you!
• Dr. Adam S. Garden
– Professor
– Department of Radiation Oncology
– University of Texas MD Anderson Cancer Center
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