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Metastasis of oral cancer to the parotid node
European Journal of Surgical Oncology, 06/26/09

Harada H et al. - In a trial to analyze the incidence and indicators of oral cancer metastases to the parotid node, it appears that metastasis to the parotid nodes should be considered in pts with oral cancer. Resection of the tail of the parotid gland is warranted during neck dissection.

• The records of 253 pts with oral carcinomas who had undergone 289 neck dissections were reviewed.
• Histologic diagnoses of the primary tumors were squamous cell carcinoma in 239 pts, mucoepidermoid carcinoma in 5, adenoid cystic carcinoma in 4, and miscellaneous others in 5.
• In all neck dissections, the tail of the parotid gland below the marginal mandibular branch of the facial nerve was resected.
• The cervical and parotid lymph nodes were isolated from the surgical specimens.
• 1 section through the maximum cross-sectional area of each node was examined histologically.

• From 183 of the 289 neck specimens, 539 parotid nodes were collected: 222 extraglandular and 317 intraglandular.
• Of the 253 pts, 10 (4.0%) had 19 parotid node metastases, of which 4 were extraglandular and 15 intraglandular.
• Parotid node involvement occurred in 2.5% of oral squamous cell carcinoma cases.
• For the other cancers, there were too few cases to determine a meaningful frequency.
• In terms of indicators, likelihood of metastasis to the parotid nodes increased with number of cancer-positive cervical nodes.

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