Unexpected nature of a pelvic mass in pregnancy: Castleman's disease.

The obstetrician is rarely confronted with a pregnant patient who presents with a large suspicious pelvic mass. Diagnostic tools are not always of value and laparotomy may be performed for obstetric and histopathologic reasons. In this article we present an interesting case of an unusual pelvic mass in pregnancy secondary to benign lymphoepithelial disease (Castleman's disease). We could not find a case similar to the one reported in the medical literature.