[Rare pelvic tumors. A case report]

Two cases of rare pelvic masses of obscure origin are presented. The first was a giant pyometra, simulating an ovarian cyst, detected accidentally 13 years after conisation. The second was hematoma of lower parts of rectus muscles, also detected accidentally. The woman had a history of long-lasting anticoagulation, but couldn't remember any trauma. The difficulties of differential diagnosis are discussed.