We report an extremely rare case of an internal abdominal hernia, through the right mesocolon, in a young woman with a right colon with no peritoneal fixation. This hernia was revealing by abdominal pain, nausea, and vomiting. The diagnosis of internal hernia was suggested by computed tomography (CT), but the exact type of internal hernia was confirmed by surgical exploration. The postoperative course was uneventful and the patient fully recovered after 3 days. The patient is free from symptoms and from recurrence, after 12 months of follow-up. Content Type Journal ArticleCategory Case ReportDOI 10.1007/s10029-009-0553-7Authors Y. Narjis, Department of General Surgery CHU Mohammed VI Marrakech MoroccoR. Jgounni, Department of General Surgery CHU Mohammed VI Marrakech Mor...