The phrase "a rare pattern" is correct and usable in written English.
You can use it when describing something that occurs infrequently or is not commonly observed.
Example: "The researchers discovered a rare pattern in the data that could lead to new insights in the field."
Alternatives: "an unusual pattern" or "a unique pattern."
Transscaphoid, transtriquetral, transcapitate dislocation with a volar intercalated segment instability pattern is a very rare pattern of carpal injury.
Lateral distraction injuries represent a very rare pattern of injury with only five cases reported in the literature.
Transscaphoid, transcapitate, transtriquetral dislocation is a very rare pattern of carpal injury, with only two cases reported in the literature [5, 9].
In the present case, BHD mutations were identified at exon 12 (c.1379_1380 delTC) of the FCLN gene, which is a relatively rare pattern [2,7].
In the second, the cortex fills the entire mantle and creates an undulating pattern along the walls of the lateral ventricles, a rare LIS pattern (LR05-388; p.N329S; Fig. 4F J).
If two people share a rare DNA pattern, it makes it more likely that they are related.
The diffuse lepidic adenocarcinoma (DLA), formerly diffuse bronchioloalveolar carcinoma, represents a rare specific pattern of worse prognostic lung neoplastic injury, with severity ranging from symptoms of limited expression to life-threatening ARDS.
Its glyphs are arranged in a rare mat pattern, copied from Copán.
A rare diffuse pattern of growth characterised by horizontal growth can masquerade as uveitis.
In AML there is evidence of a genetically determined factor carrying a high risk of the development of the disease, in that a member of each of 5 different families of the 25 studied bore a rare hypothenar pattern, compared with none in 75 control families.
