A needle biopsy of this pancreatic solid pseudopapillary neoplasm was labeled "gastric mass". We initially tried to make it into a neuroendocrine tumor.... Sometimes the needle is not where it is believed to be. LEF1 is a nice clean nuclear stain and easier to interpret than beta catenin. Case by Dr. Elizabeth Montgomery, Clinical Professor, Vice Chair of Faculty Development & Mentoring, Director of Surgical Pathology Fellowship Training Program, Co-Director, Pathology Reference Services, and...

This is a beautiful follicular dendritic cell sarcoma that presented as a breast mass. Note the lymphoid cuff and dense tumor infiltrating lymphocytes. Case by Dr. Elizabeth Montgomery, Clinical Professor, Vice Chair of Faculty Development & Mentoring, Director of Surgical Pathology Fellowship Training Program, Co-Director, Pathology Reference Services, and Editor-In-Chief at Innovative Science Press. You can check out our titles at: www.innovativesciencepress.com info@innovativepathologypres...

Small intestinal traditional serrated adenomas can be syndromic (familial adenomatous polyposis) or sporadic. They have the same ectopic crypt formations as those seen in the colon. Alruwaii ZI, Chianchiano P, Larman T, Wilentz A, Wood LD, Montgomery EA. Familial Adenomatous Polyposis-associated Traditional Serrated Adenoma of the Small Intestine: A Clinicopathologic and Molecular Analysis. Am J Surg Pathol. 2021 Dec 1;45(12):1626-1632. PMID: 34232600. www.innovativesciencepress.com Case...