 1. Pregnant women are excluded from this study because the effects of 68Ga-DOTATOC in pregnancy are not known; exceptions may be granted only if the expected risk outweighs the benefit, in the clinical opinion of the attending physician. Pregnancy testing will follow MD Anderson procedure for diagnostic reagents. Self-reporting is used to assess pregnancy status. If the subject is unsure about her status, a urine or serum pregnancy test will be performed before inclusion 