title: PEComa of the mesentery coexisting with colon cancer: a case report.
abstract: Perivascular epithelioid cell tumor (PEComa) is a rare entity originating from mesenchymal tissue, which stains for both melanocytic and smooth muscle markers. We would like to present an unusual case of the PEComa of the mesentery which was unexpected discovery in a female patient with colonic adenocarcinoma. The tumour was revealed on the computer tomography and then resected during surgery, with subsequent chemotherapy for the colon adenocarcinoma. Furthermore we would like to discuss PEComa biology, emphasizing histological criteria of malignancy, possible treatment options and differential diagnosis which is mostly based on immunohistochemistry. Virtual slides: The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1809062291157051 .
authors.affiliation: Department of Pathology, Professor Witold Orlowski Public Clinical Hospital, Medical Center for Postgraduate Education, Czerniakowska 231, 00-416, Warsaw, Poland. jarwej@poczta.fm.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Wejman
authors.affiliation: Department of Pathology, Professor Witold Orlowski Public Clinical Hospital, Medical Center for Postgraduate Education, Czerniakowska 231, 00-416, Warsaw, Poland. lek.krzysztof.nowak@gmail.com.
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Nowak
authors.affiliation: Department of Pathology, Professor Witold Orlowski Public Clinical Hospital, Medical Center for Postgraduate Education, Czerniakowska 231, 00-416, Warsaw, Poland. lgielniewska@wp.pl.
authors.forename: Lena
authors.initials: L
authors.lastname: Gielniewska
authors.affiliation: Department of Pathology, Professor Witold Orlowski Public Clinical Hospital, Medical Center for Postgraduate Education, Czerniakowska 231, 00-416, Warsaw, Poland. madzia.komorowska@gmail.com.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Komorowska
authors.affiliation: Department of General and Hematological Surgery, Institute of Hematology and Transfusion Medicine, Indiry Gandhi 14 street, 02-776, Warsaw, Poland. wdwaw@poczta.onet.pl.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Dąbrowski
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology* / Q000628:therapy; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D001706:Biopsy; D017024:Chemotherapy, Adjuvant; D003082:Colectomy; D003110:Colonic Neoplasms / Q000473:pathology* / Q000628:therapy; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D033162:Incidental Findings; D008643:Mesentery / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000628:therapy; D010534:Peritoneal Neoplasms / Q000737:chemistry / Q000473:pathology / Q000628:therapy; D054973:Perivascular Epithelioid Cell Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000628:therapy; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D014408:Biomarkers, Tumor