Retroperitoneal dedifferentiated liposarcoma with osteosarcomatous components: a case report.

We report a rare case of recurrent retroperitoneal dedifferentiated liposarcoma with osteosarcomatous components. An 82-year-old male diagnosed with recurrent retroperitoneal liposarcoma underwent a tumor resection. Histologically, osseous matrix with osteoid and mature hyaline cartilaginous tissues with high cellularity were observed in a fibrous background through most of the tumor, and scattered MDM2- and CDK4-positive atypical hyperchromatic stromal cells were detected surrounding the dedifferentiated areas.

Hernia of the umbilical cord and associated ileal prolapse through a patent omphalomesenteric duct: prenatal ultrasound and MRI findings.

Background: It is quite unusual for a fistula to communicate directly with the surface of the hernia sac, and associated prolapse of the ileum through a patent omphalomesenteric duct is also extremely rare.

Objectives: We report a unique case of a fetus exposed to methimazole in utero, with a hernia of the umbilical cord and associated ileal prolapse through a patent omphalomesenteric duct.

Methods And Results: In this case, the umbilical cord was attached to a small unruptured omphalocele, to the right of which a small everted loop of the ileum had evaginated.