The phrase "alterations are known" is correct and usable in written English.
It can be used in contexts where you want to indicate that changes or modifications have been recognized or acknowledged.
Example: "In the final report, it was noted that the alterations are known to the committee and have been approved."
Alternatives: "changes are acknowledged" or "modifications are recognized."
These dystrophic neurites displayed tau phosphorylation (AT8-positive) and actin cofilin rods, and both alterations are known to alter cytoskeletal dynamics in neurons (revised in [ 6]).
Even though neuronal alterations are known to be predominant in both AD and MCI, evidences from neuropathology and neuroimaging studies demonstrated that cerebral microvascular changes are associated with these disorders8,44,45,46,47.
These storm-time alterations are known to often provoke ionospheric positive storms in the winter hemisphere, whereas negative storms occur more often in the summer hemisphere (e.g., Prölss 1995; Danilov 2013).
Sleep alterations are known to have deleterious consequences in healthy subjects, but the paucity of data in the literature [4 7] makes it difficult to determine the impact of sleep abnormalities in ICU patients.
Collectively, these alterations are known as desmoplasia.
These alterations are known to increase the risk of obesity.
This array of morphologic alterations is known as diffuse alveolar damage.
Accumulation of multiple genetic alterations is known to be associated with the development and progression of cancer (Loeb et al, 1991).
The alterations in the GALNS gene associated with Morquio A are numerous and heterogeneous and have been found throughout the coding sequence and flanking splice sites; as of 2005, 148 unique gene alterations were known [Tomatsu et al., 2005b] and many more have since been reported.
Wettability alteration is known to occur in low salinity waterflooding of carbonate rocks.
Gene copy number alteration is known to be an important mechanism for a cancer cell to regulate the expression of cellular proto-oncogenes and tumor suppressor genes.
