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J Oral Maxillofac Surg. 1998 Jan;56(1):23-6; discussion 26-7.

Determining whether a parotid tumor is in the superficial or deep lobe using magnetic resonance imaging.

Author information

1
Department of Oral Surgery, Osaka Medical College, Japan.

Abstract

PURPOSE:

This study examined the usefulness of magnetic resonance imaging (MRI) in assessing whether parotid tumors were located in the superficial or deep lobe.

PATIENTS AND METHODS:

Eight patients with parotid gland tumors underwent MRI using a spin echo pulse sequence. T1- and T2-weighted images were obtained. To assess tumor localization in the parotid gland, two anatomic landmarks were used: 1) a line connecting the lateral surface of posterior belly of digastric muscle and lateral surface of the cortical bone of ascending ramus (facial nerve [FN] line) and 2) the relationship to the retromandibular vein (RV). Results of all MRI examinations were compared with the surgical findings.

RESULTS:

Seven of eight cases were correctly diagnosed using the FN line criterion. Five of eight cases were correctly diagnosed using the RV criterion.

CONCLUSION:

MRI is an excellent modality to show tumor localization in the parotid gland.

PMID:
9437977
[Indexed for MEDLINE]

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