Advanced
Technical
IVT
acoustic hollowness
Ultrasonographic characteristic of choroidal melanomas showing reduced internal reflectivity. Distinguished from solid echogenicity of other intraocular tumors.
Full Definition
An ultrasonographic feature characteristic of choroidal melanomas, where the tumor demonstrates low internal reflectivity or 'hollowness' on A-scan and B-scan examination compared to surrounding ocular tissues. This acoustic property results from the loose cellular arrangement and melanin content of melanomas, helping distinguish them from other intraocular tumors such as metastases or hemangiomas, which typically show more solid echogenicity.
Usage
Usage note: Distinguish from 'cystic' changes which imply fluid-filled spaces rather than tissue characteristics.
In Context
- "B-scan ultrasonography revealed acoustic hollowness characteristic of choroidal melanoma." — diagnostic imaging report
- "The acoustic hollowness helped differentiate melanoma from choroidal metastasis." — differential diagnosis note
Also known as
tumor hollowness
acoustic transparency
Contrasted with
acoustic density
solid echogenicity
Don't confuse with
vitreous hollowness
cystic lesion