At each monthly study visit, you will be given enough atiprimod to last until your next clinic visit (Week 4 of next cycle). You will be given a diary for recording when you take the atiprimod, the type and amount of beverage consumed during the 2-hour period before taking atiprimod and the 2-hour period after taking atiprimod, other medications that you take, and any side effects that you experience. During these monthly visits, you will have several tests performed. You will be asked questions about the doses of atiprimod you have taken on your own. You will have a physical exam, including measurement of your vital signs, routine blood (about 1 teaspoon) and urine tests, and an ECG. You will have a neurological exam. You will be asked questions about your physical, social/family, emotional, and functional well-being, as well as additional concerns you may have regarding numbness, tingling, discomforts, and difficulties you may be having. A single blood collection (less than half of a teaspoon) will be taken for PK testing. Your tumor will be measured using the same kinds of scans as before. Women who are able to have children will have a blood pregnancy test.