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Focally Increased Activity on Scinticisternography: Report of Two Cases

University of Minnesota at St. Paul-Ramsey Hospital, St. Paul, Minnesota

Correspondence: For reprints contact: Robert R. McClelland, Dept. of Radiology, St. Paul-Ramsey Hospital, St. Paul, MN 55101.

ABSTRACT

Two cases where focally increased activity was noted on scinticisternography are reported. One case involves a documented arteriovenous malformation, and the other, documented embolic vascular disease. After a review of the pertinent literature, various other pathologic entities associated with similar scan findings are described. Possible causative mechanisms are discussed.