RaoR.; VijM.; SinglaN.; KumarA. Malignant Pancreatic Extra-Gastrointestinal Stromal Tumor Diagnosed by Ultrasound Guided Fine Needle Aspiration Cytology. A Case Report with a Review of the Literature. JOP. Journal of the Pancreas, v. 12, n. 3, p. 283-286, 6 maio 2011.