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Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases

  • Authors:
    • Jun Zhou
    • Jingjing Xu
    • Guozhong Jiang
    • Yihui Ma
    • Jingwen Qi
    • Wencai Li
    • Dandan Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
    Copyright: © Zhou et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 887-892
    |
    Published online on: December 12, 2016
       https://doi.org/10.3892/ol.2016.5486
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Abstract

Gastric plexiform fibromyxoma (PF) is a rare mesenchymal tumor with a histologically distinctive multinodular pattern, dissimilar to conventional gastrointestinal stromal tumor (GIST). The current study presents one case of gastric PF, and one case of GIST with a platelet‑derived growth factor receptor α (PDGFRA) mutation mimicking PF, and discusses their differential diagnoses. The two patients were a 51‑year‑old male with PF and a 47‑year‑old female with GIST, each of whom presented with an occupying lesion in the gastric antrum. Histologically, the two cases shared a rare and approximately unanimous morphological pattern of a prominent multinodular and plexiform figuration in the gastric wall, including mucoid matrix, short spindle cells and small caliber vascular elements, and areas of stromal tumor cells exhibited an epithelioid appearance. Immunohistochemistry revealed that the PF tumor cells were positive for smooth muscle actin (SMA), but negative for mast/stem cell growth factor receptor (KIT), GIST‑1 (DOG1), cluster of differentiation (CD) 34, S‑100, desmin and cytokeratin AE1/AE3. The case of GIST expressed KIT and DOG1, but was negative for SMA, CD34, S‑100, desmin and AE1/AE3. In addition, the GIST case, which was observed to harbor a D842V mutation in exon 18 of PDGFRA, was demonstrated to be genetically distinct from PF. The cases presented in the current study were uncommon in that GIST exhibited a plexiform appearance that mimicked the histology of the rare PF tumor; therefore, GIST must be considered and discounted first when determining a differential diagnosis for a gastrointestinal mesenchymal neoplasm.
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Copy and paste a formatted citation
Spandidos Publications style
Zhou J, Xu J, Jiang G, Ma Y, Qi J, Li W and Zhang D: Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases. Oncol Lett 13: 887-892, 2017.
APA
Zhou, J., Xu, J., Jiang, G., Ma, Y., Qi, J., Li, W., & Zhang, D. (2017). Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases. Oncology Letters, 13, 887-892. https://doi.org/10.3892/ol.2016.5486
MLA
Zhou, J., Xu, J., Jiang, G., Ma, Y., Qi, J., Li, W., Zhang, D."Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases". Oncology Letters 13.2 (2017): 887-892.
Chicago
Zhou, J., Xu, J., Jiang, G., Ma, Y., Qi, J., Li, W., Zhang, D."Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases". Oncology Letters 13, no. 2 (2017): 887-892. https://doi.org/10.3892/ol.2016.5486
Copy and paste a formatted citation
x
Spandidos Publications style
Zhou J, Xu J, Jiang G, Ma Y, Qi J, Li W and Zhang D: Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases. Oncol Lett 13: 887-892, 2017.
APA
Zhou, J., Xu, J., Jiang, G., Ma, Y., Qi, J., Li, W., & Zhang, D. (2017). Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases. Oncology Letters, 13, 887-892. https://doi.org/10.3892/ol.2016.5486
MLA
Zhou, J., Xu, J., Jiang, G., Ma, Y., Qi, J., Li, W., Zhang, D."Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases". Oncology Letters 13.2 (2017): 887-892.
Chicago
Zhou, J., Xu, J., Jiang, G., Ma, Y., Qi, J., Li, W., Zhang, D."Gastrointestinal stromal tumor with a PDGFRA mutation masquerading as gastric plexiform fibromyxoma: A comparative clinicopathological study of two cases". Oncology Letters 13, no. 2 (2017): 887-892. https://doi.org/10.3892/ol.2016.5486
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