cases, mediastinum Week 523: Case 1 April 26, 2023 pathadmin 1. Presented by Peter Illei, M.D. and prepared by Robert E. LeBlanc, M.D.39 year old white female patient with a history of Crohn"s disease and status post ileocolectomy and subsequent segmental small bowel resection including prior anastomosis site. Follow up CT scan revealed a 4 cm anterior mediastinal mass. The patient had no evidence of malignancy in the bowel resections.AdenocarcinoidEmbryonal carcinomaMucinous adenocarcinomaMetastatic adenocarcinoma of the lung 1. Presented by Peter Illei, M.D. and prepared by Robert E. LeBlanc, M.D.39 year old white female patient with a history of Crohn"s disease and status post ileocolectomy and subsequent segmental small bowel resection including prior anastomosis site. Follow up CT scan revealed a 4 cm anterior mediastinal mass. The patient had no evidence of malignancy in the bowel resections.