PMID- 16343800 OWN - NLM STAT- MEDLINE DCOM- 20060821 LR - 20151119 IS - 0344-0338 (Print) IS - 0344-0338 (Linking) VI - 202 IP - 1 DP - 2006 TI - Perivascular epithelioid cell sarcoma (malignant PEComa) of the ileum. PG - 37-41 AB - Epithelioid angiomyolipoma (AML) is the prototype of a heterogeneous group of lesions characterized by the presence of HMB-45 positive cells with clear cytoplasm, perivascular distribution, and combined myomelanocytic features, so-called perivascular epithelioid cells (PECs). These lesions are being increasingly referred to as PEComas. PEComas have been reported at diverse anatomic sites, but mainly in the abdominopelvic cavity and rarely in parenchymatous organs, skin, and soft tissues. Gastrointestinal (GI) PEComas are exceptionally rare, with less than 10 cases documented so far. Rare examples of PEComas with pleomorphic histology could have been misinterpreted as unusual variants of carcinoma or sarcoma. To make a contribution to the differential diagnosis of difficult-to-classify pleomorphic GI sarcomas, we report on a malignant pleomorphic neoplasm with features of PEComa involving the terminal ileum in a 63-year-old woman. Fourteen months after resection of the primary tumor, a huge abdominopelvic recurrence was successfully resected, but no distant metastases were detected. The differential diagnosis and malignancy criteria of GI PEComas will be discussed. FAU - Agaimy, A AU - Agaimy A AD - Institut fur Pathologie, Klinikum Nurnberg, Prof. Ernst-Nathan-Strasse 1, 90419 Nurnberg, Germany. abbas.agaimy@klinikum-nuernberg.de FAU - Wunsch, P H AU - Wunsch PH LA - eng PT - Case Reports PT - Journal Article DEP - 20051215 PL - Germany TA - Pathol Res Pract JT - Pathology, research and practice JID - 7806109 RN - 0 (Biomarkers, Tumor) SB - IM MH - Angiomyolipoma/*diagnosis/*pathology MH - Biomarkers, Tumor MH - Diagnosis, Differential MH - Epithelioid Cells/pathology MH - Female MH - Humans MH - Ileal Neoplasms/*pathology/*surgery MH - Ileum/pathology MH - Immunohistochemistry MH - Middle Aged MH - Sarcoma/*diagnosis/*pathology MH - Treatment Outcome EDAT- 2005/12/14 09:00 MHDA- 2006/08/22 09:00 CRDT- 2005/12/14 09:00 PHST- 2005/08/23 00:00 [received] PHST- 2005/10/27 00:00 [accepted] PHST- 2005/12/14 09:00 [pubmed] PHST- 2006/08/22 09:00 [medline] PHST- 2005/12/14 09:00 [entrez] AID - S0344-0338(05)00214-1 [pii] AID - 10.1016/j.prp.2005.10.008 [doi] PST - ppublish SO - Pathol Res Pract. 2006;202(1):37-41. doi: 10.1016/j.prp.2005.10.008. Epub 2005 Dec 15.