tumor echogenicity
Pronunciation: ek-oh-jen-ih-SIT-ee
The acoustic reflectivity pattern of intraocular masses on ultrasonography, used to characterize tissue density and internal structure.
Full Definition
Tumor echogenicity refers to the acoustic reflectivity characteristics of intraocular masses as detected by standardized A-scan and B-scan ultrasonography. This parameter provides crucial diagnostic information about tissue composition and internal structure of ocular tumors. Melanomas typically demonstrate medium to high internal reflectivity with regular internal structure, while metastatic lesions often show high reflectivity with irregular internal architecture. Acoustic parameters include initial spike height, internal structure pattern, and sound attenuation characteristics. The echogenicity pattern, combined with other ultrasonic features such as tumor dimensions and vascularity, helps differentiate between various tumor types and guides treatment planning decisions.
Usage
Usage note: Specify measurement standardization; correlate with other ultrasonic parameters.
In Context
- "A-scan ultrasonography revealed medium internal echogenicity with regular structure, supporting the diagnosis of choroidal melanoma." — Diagnostic imaging report
- "The high echogenicity and irregular internal pattern suggested metastatic disease rather than primary uveal melanoma." — Ultrasound interpretation