tumor thickness
Maximum perpendicular measurement from tumor base to apex, critical for staging and treatment selection in uveal melanoma. Measured in millimeters via ultrasonography.
Full Definition
The maximum perpendicular distance from the base of an intraocular tumor to its highest point (apex), measured in millimeters using B-scan ultrasonography. Tumor thickness is a critical parameter in the AJCC staging system for uveal melanoma and directly influences treatment decisions, with thicker tumors generally requiring more aggressive intervention. Accurate measurement and documentation of tumor thickness is essential for treatment planning and prognostic assessment.
Usage
Usage note: Always specify units (millimeters) when documenting measurements. Distinguish from tumor diameter in reports.
In Context
- "B-scan ultrasonography revealed a tumor thickness of 8.2 mm." — diagnostic imaging report
- "Treatment selection was based on tumor thickness and basal diameter measurements." — treatment planning note