Vermiform appendix torsion is rare, and even more uncommon is the volvulus of appendiceal mucinous tumors. To our knowledge, only nine cases of torsion of the vermiform appendix associated with appendiceal mucinous neoplasms have been reported up to date. We report a case of secondary torsion of the vermiform appendix with mucinous cystadenoma in a 30-year-old man. The symptoms were consistent ...

BACKGROUND A distended, mucous-filled appendix is known as an appendiceal mucocele. They are a rare form of an appendiceal mass and develop from both benign and malignant processes. Mucoceles can develop secondarily to an obstruction, such as from a fecalith, scarring or, rarely, endometriosis. Only 12 cases of non-neoplastic appendiceal mucoceles caused by endometriosis have been previously de...

BACKGROUND A successful new treatment for a particular disease may change the natural history of that disease as patients go on to longer survival. The goal of this study was to investigate the porta hepatis as a site of recurrence of appendiceal mucinous neoplasms. METHODS A prospective database on patients with peritoneal dissemination of mucinous appendiceal neoplasms has been maintained f...

Appendiceal goblet cell adenocarcinomas (GCA) are rare entities with a distinctive composition of goblet, paneth and neuroendocrine cells. Cases combined or collision GCAs other appendiceal tumours exist in the literature, only few publications describing GCA low-grade mucinous neoplasm (LAMN). A 73-year-old female underwent right hemicolectomy following an orifice polypectomy showing adenocarc...

AIM OF THE STUDY To analyse the incidence of appendiceal neuroendocrine neoplasms in appendectomy specimens and establish the epidemiological and histopathological features, treatment, and clinical course. MATERIAL AND METHODS Between 2004 and 2013, 975 patients who underwent appendectomy in Ankara Oncology Education and Research Hospital were retrospectively analysed. RESULTS Neuroendocrin...

Gastrointestinal neuroendocrine neoplasms (GI-NENs) are increasingly being recognised, while appendiceal NENs (aNENs) currently constitute the third most common GI-NEN. Appendiceal NENs are generally considered to follow an indolent course with the majority being localised at diagnosis. Thus, the initial surgical approach is not that of a planned oncological resection. Due to the localised natu...

Introduction Appendiceal mucinous neoplasms can involve peritoneal pseudomyxoma or invasion of adjacent organs. This report describes a rare case in which giant appendiceal carcinoma expansively developed the retroperitoneum without perforating abdominal cavity. Case Presentation The patient was 55-year-old woman with no relevant history who admitted to our hospital after imaging examination re...