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. 2023 Nov 4;15(21):5292. doi: 10.3390/cancers15215292

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Comparison of tumor diameters between transoral US and corresponding MRI images of a stage-T2 palatine tonsil HPV+ SCC: (a) a patient with an asymmetric left palatine tonsil with an inserted hockey-stick ultrasound transducer placed onto the tonsil in a transverse plane; (b) transverse US reveals a palatine tonsil tumor. Tumor diameters are represented from medial (Med) to lateral (Lat) with a red dotted line and from anterior (Ant) to posterior (Pos) with a yellow dotted line; (c) axial MRI with the corresponding diameters as in (b, red and yellow dotted lines); (d) transducer oriented in the sagittal plane; (e) sagittal US with the cranial (Cra) to caudal (Cau) diameter added (blue dotted line) along with Ant-Pos (yellow dotted line); (f) sagittal MRI with the corresponding diameters as in (e, blue and yellow dotted lines). US: ultrasound; MRI: magnetic resonance imaging; HPV+ SCC: human papillomavirus-positive squamous cell carcinoma; ICA: internal carotid artery; ECA: external carotid artery; MPM: medial pterygoid muscle; SPM: stylopharyngeus muscle; white dashed line: constrictor muscle; Ant: anterior; Pos: posterior; Med: medial; Lat: lateral; Cra: cranial; Cau: caudal.

Comparison of tumor diameters between transoral US and corresponding MRI images of a stage-T2 palatine tonsil HPV+ SCC: (a) a patient with an asymmetric left palatine tonsil with an inserted hockey-stick ultrasound transducer placed onto the tonsil in a transverse plane; (b) transverse US reveals a palatine tonsil tumor. Tumor diameters are represented from medial (Med) to lateral (Lat) with a red dotted line and from anterior (Ant) to posterior (Pos) with a yellow dotted line; (c) axial MRI with the corresponding diameters as in (b, red and yellow dotted lines); (d) transducer oriented in the sagittal plane; (e) sagittal US with the cranial (Cra) to caudal (Cau) diameter added (blue dotted line) along with Ant-Pos (yellow dotted line); (f) sagittal MRI with the corresponding diameters as in (e, blue and yellow dotted lines). US: ultrasound; MRI: magnetic resonance imaging; HPV+ SCC: human papillomavirus-positive squamous cell carcinoma; ICA: internal carotid artery; ECA: external carotid artery; MPM: medial pterygoid muscle; SPM: stylopharyngeus muscle; white dashed line: constrictor muscle; Ant: anterior; Pos: posterior; Med: medial; Lat: lateral; Cra: cranial; Cau: caudal.