title: Primary malignant mesothelioma of the peritoneum: a clinical and immunohistochemical study.
abstract: BACKGROUND
  Primary peritoneal mesothelioma is regarded as a fatal disease that presents with progressive ascites at a relatively late stage of its natural history. Differential diagnosis between this rare tumor and both serous papillary carcinoma of the peritoneum and ovary can be problematic.
  
  
  METHODS
  A 54-year-old woman presented to our institution with a 4-month history of dull epigastric pain and increased abdominal girth. Exploratory laparotomy revealed the presence of extensive intraperitoneal dissemination of a malignant neoplasm without a recognizable primary site. Suboptimal cytoreduction was carried out, and histological diagnosis was that of a malignant epithelioid mesothelioma. This was confirmed with a panel of immunohistochemical markers. The patient despite having a complete response after adjuvant chemotherapy died 18 months after primary surgery.
  
  
  CONCLUSIONS
  No single immunohistochemical stain is pathognomonic of peritoneal primary malignant mesothelioma (PMM), and the results of a panel of antibodies should be interpreted to set the diagnosis.
authors.affiliation: Department of Histopathology, "Alexandra" Hospital, Athens, Greece.
authors.forename: Sophia
authors.initials: S
authors.lastname: Markaki
authors.forename: Athanasios
authors.initials: A
authors.lastname: Protopapas
authors.forename: Spyros
authors.initials: S
authors.lastname: Milingos
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Lazaris
authors.forename: Aris
authors.initials: A
authors.lastname: Antsaklis
authors.forename: Stylianos
authors.initials: S
authors.lastname: Michalas
mesh_terms: D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008654:Mesothelioma / Q000378:metabolism* / Q000473:pathology*; D008875:Middle Aged; D010534:Peritoneal Neoplasms / Q000378:metabolism* / Q000473:pathology*