title: Malignant deciduoid mesothelioma: a diagnostic challenge.
abstract: Malignant deciduoid mesothelioma, a rare phenotype of epithelioid mesothelioma, arises more commonly from the peritoneum of young women, but it is also reported in the pleura of elderly people. We report a case of malignant deciduoid mesothelioma that occurred in a 41-year-old woman after cesarean section and was initially misdiagnosed as pseudotumoral deciduosis. Microscopically, the tumor was entirely composed of deciduoid areas, and only scattered tumor cells were positive for calretinin and keratin 5/6. The patient died 14 months after the first operation. This observation confirms the poor prognosis of this entity and the importance of the differential diagnosis of pseudotumoral deciduosis.
authors.affiliation: Department of Pathology, Hôpital St-Antoine, Paris, France. najat.mourra@sat.ap-hop-paris.fr
authors.forename: Najat
authors.initials: N
authors.lastname: Mourra
authors.forename: Cecile
authors.initials: C
authors.lastname: de Chaisemartin
authors.forename: Isabelle
authors.initials: I
authors.lastname: Goubin-Versini
authors.forename: Rolland
authors.initials: R
authors.lastname: Parc
authors.forename: Jean-Francois
authors.initials: JF
authors.lastname: Flejou
mesh_terms: D000328:Adult; D002828:Choristoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004717:Endometrium / Q000473:pathology*; D005260:Female; D006801:Humans; D008654:Mesothelioma / Q000175:diagnosis*; D009852:Omentum / Q000473:pathology*; D010049:Ovarian Diseases / Q000175:diagnosis*; D010051:Ovarian Neoplasms / Q000175:diagnosis*; D010532:Peritoneal Diseases / Q000175:diagnosis; D010534:Peritoneal Neoplasms / Q000175:diagnosis*; D014591:Uterine Diseases / Q000175:diagnosis*; D014594:Uterine Neoplasms / Q000175:diagnosis*