HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Perivascular epithelioid cell tumor of gastrointestinal tract: case report and review of the literature.

Abstract
Perivascular epithelioid cell tumors of gastrointestinal tract (GI PEComas) are exceedingly rare, with only a limited number of published reports worldwide. Given the scarcity of GI PEComas and their relatively short follow-up periods, our current knowledge of their biologic behavior, molecular genetic alterations, diagnostic criteria, and prognostic factors continues to be very limited.We present 2 cases of GI PEComas, one of which showed an aggressive histologic behavior that underwent multiple combined chemotherapies. We also review the available English-language medical literature on GI PEComas-not otherwise specified (PEComas-NOS) and discuss their clinicopathological and molecular genetic features.Pathologic analyses including histomorphologic, immunohistochemical, and ultrastructural studies were performed to evaluate the clinicopathological features of GI PEComas, their diagnosis, and differential diagnosis. Immunohistochemistry, semiquantitative reverse transcriptase polymerase chain reaction, and DNA sequencing assays were carried out to detect the potential molecular genetic alterations in our cases. Microscopically, the tumors showed distinctive histologic features of PEComas-NOS, including fascicular or nested architecture, epithelioid or spindled cell type, and clear to eosinophilic cytoplasm. The tumor cells were immunohistochemically positive for melanocytic markers. Molecular pathological assays confirmed a PSF-TFE3 gene fusion in one of our cases. Furthermore, in this case microphthalmia-associated transcription factor and its downstream genes were found to exhibit elevated transcript levels.Knowledge about the molecular genetic alterations in GI PEComas is still limited and warrants further study.
AuthorsBiyan Lu, Chenliang Wang, Junxiao Zhang, Roland P Kuiper, Minmin Song, Xiaoli Zhang, Shunxin Song, Ad Geurts van Kessel, Aikichi Iwamoto, Jianping Wang, Huanliang Liu
JournalMedicine (Medicine (Baltimore)) Vol. 94 Issue 3 Pg. e393 (Jan 2015) ISSN: 1536-5964 [Electronic] United States
PMID25621681 (Publication Type: Case Reports, Journal Article, Research Support, Non-U.S. Gov't, Review)
Chemical References
  • Actins
  • Basic Helix-Loop-Helix Leucine Zipper Transcription Factors
  • Biomarkers, Tumor
  • MART-1 Antigen
  • Melanoma-Specific Antigens
  • PMEL protein, human
  • TFE3 protein, human
  • gp100 Melanoma Antigen
Topics
  • Actins (metabolism)
  • Adult
  • Basic Helix-Loop-Helix Leucine Zipper Transcription Factors (genetics)
  • Biomarkers, Tumor (metabolism)
  • Diagnosis, Differential
  • Female
  • Gastrointestinal Neoplasms (diagnosis, genetics, metabolism)
  • Gene Fusion (genetics)
  • Humans
  • MART-1 Antigen (metabolism)
  • Melanoma-Specific Antigens (metabolism)
  • Perivascular Epithelioid Cell Neoplasms (diagnosis, genetics, metabolism)
  • gp100 Melanoma Antigen

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: