The phrase "a special treatment" is correct and usable in written English. You can use it when you want to refer to a preferential or exclusive treatment given to a certain person or group of people. For example: "The celebrity received a special treatment from the hotel staff."
In addition, Mrs. Clinton's idea that New York City deserves a special treatment smacks of provincialism.
The cut-cell procedure inevitably leads to non-matching interfaces, demanding for a special treatment.
A special treatment is developed to take the hollow nature of ceramic foam struts into account.
A special treatment for the particle shifting between fluid and solid wall is highlighted.
The one thing we won't tolerate is Christianity getting a special treatment not afforded to us or anyone else.
This article also covers physically non-linear behaviour of complex components, which asks for a special treatment.
The unique characteristics of computer vision, particularly its experimental aspect, call for a special treatment of this matter.
"I think it's kind of a natural thing to give to those who have won a competition a special treatment like this".
When I was in high school, my advisor, Michael Mulligan, called my parents to recommend a special treatment for my anxiety: Transcendental Meditation (TM).
We simulate such flows using a higher-order Cartesian-grid method, together with a special treatment for the cells cut by the boundary of an object.
The internal defects are represented by the level sets, while the shear-locking effect is eliminated by a special treatment, multiplying the shear terms by a factor.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK