Wiki Venus Sinus Thrombosis

So then would 437.6 be more appropriate since the documentation does not specify it as being pyogenic? Does 325 and 437.6 describe the same condition except one is pyogenic and the other is nonpyogenic? Or, are they different conditions since they are located in different sections? 325 is in the nerveous system section and 437.6 is in the circulatory section.