Cystic changes in hepatic metastases from gastrointestinal stromal tumors (GISTs) treated with Gleevec (imatinib mesylate).

Objective: The purpose of this article is to illustrate the CT findings in patients with hepatic metastases from a gastrointestinal stromal tumor who were treated with STI-571.

Conclusion: Hepatic metastases from gastrointestinal stromal tumors that respond to treatment with STI-571 can appear as near-cystic components with well-defined borders on contrast-enhanced CT. Most metastases became smaller. These metastases resemble simple cysts, but density measurements may differentiate them from one another.