The phrase "a gross extent" is correct and usable in written English.
It can be used to describe something that is significant or excessive in degree or amount.
Example: "The pollution in the river has reached a gross extent, affecting both wildlife and local communities."
Alternatives: "a significant extent" or "an excessive degree".
Gross tumor volume (GTV) was defined as the gross extent of the tumor shown by CT or magnetic resonance imaging (MRI), covering the primary tumor (GTVnx) as well as all involved regional lymph nodes (GTVnd).
His cheeks were red and his glasses were fogged, it seemed to me, from the gross extent of his trickery.
Indeed, the diminished fibrotic reaction present in ILC makes it difficult for pathologists and surgeons to determine the gross extent of the disease during surgery, and to achieve tumor-free margins after a limited excision.
The initial target volume to be drawn is usually the gross tumour volume (GTV), so named as it contains the gross extent of the tumour identifiable with the available clinical and imaging data.
GTV was defined as the gross extent of the tumor shown by imaging as well as physical examination, CTV was defined as GTV plus a 10-mm circular margin for potential microscopic spread, and planning target volume (PTV) was defined as CTV plus a 5-mm circular margin to account for organ motion and patient setup errors.
Residual gross extent of the tumor shown in CT images at 40 Gy was defined as GTV2, CTV-CT was defined as GTV2 plus a 5-mm circular margin, and PTV-CT was defined as CTV-CT plus a 5-mm circular margin.
To try to use Fukushima to justify a complete disavowal of the use of nuclear power would be a gross distortion of the extent of the threat it posed.
The enormity of the American economy, with a gross domestic product in the $10 trillion range, insulates it to some extent from international financial troubles.
