Multilocular mesothelial proliferation (MMP) is a rare lesion that mainly arises from the peritoneal mesothelium. Most often, it occurs in women of reproductive age, with a history of abdominal surgery, endometriosis, or pelvic inflammatory disease. We describe an unusual case of a 73-year-old woman affected by a large MMP, which involved the skin and presented clinically as a cutaneous mass. To the best of our knowledge, MMP involving the umbilicus has never been reported in a peer-reviewed literature.
*Department of Pathology, Clinical Oncological Scientific and Practical Centre for Specialized Medical Care, Saint-Petersburg, Russia;
†Medical Department, Saint-Petersburg State University, Saint-Petersburg, Russia;
‡Sikl's Department of Pathology, Charles University in Prague, Faculty of Medicine in Pilsen, Pilsen, Czech Republic;
§Bioptical Laboratory, Pilsen, Czech Republic.
The authors declare no conflicts of interest.
Reprints: Dmitry V. Kazakov, MD, PhD Sikl's Department of Pathology, Charles University Medical Faculty Hospital, Alej Svobody 80, 304 60 Pilsen, Czech Republic (e-mail: email@example.com).