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Dehner CA, Lo YC, Chopra S, Demicco EG, He K, Hirbe AC, Folpe AL, Chrisinger JSA. CSF1 expression in xanthogranulomatous epithelial tumor/keratin-positive giant cell-rich tumor. Hum Pathol 2024; 143:1-4. [PMID: 37993023 DOI: 10.1016/j.humpath.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 11/24/2023]
Abstract
"Xanthogranulomatous epithelial tumor" (XGET) and "keratin-positive giant cell-rich soft tissue tumor" (KPGCT), two recently described mesenchymal neoplasms, likely represent different aspects of a single entity. Both tumors are composed of only a small minority of tumor cells surrounded by large numbers of non-neoplastic inflammatory cells and histiocytes, suggesting production of a paracrine factor with resulting "landscape effect," as seen in tenosynovial giant cell tumor. Recent evidence suggests that the paracrine factor in XGET/KPGCT may be CSF1, as in tenosynovial giant cell tumor. We hypothesized that CSF1 is overexpressed in XGET/KPGCT. To test our hypothesis, we performed quantitative real time PCR (qPCR) for CSF1 expression and CSF1 RNAscope chromogenic in situ hybridization (CISH) on 6 cases of XGET/KPGCT. All cases were positive with CSF1 CISH and showed increased expression of CSF1 by qPCR. Our findings provide additional evidence that the CSF1/CSF1R pathway is involved in the pathogenesis of XGET/KPGCT. These findings suggest a possible role for CSF1R inhibition in the treatment of unresectable or metastatic XGET/KPGCT.
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Affiliation(s)
- Carina A Dehner
- Department of Anatomic Pathology and Laboratory Medicine, Indiana University, 635 Barnhill Drive, Indianapolis, IN, 46202, USA; Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St SW, Rochester, MN, 55905, USA; Department of Pathology and Immunology, Division of Anatomic and Molecular Pathology, Washington University School of Medicine, 660 S. Euclid Ave, St. Louis, MO, 63110, USA.
| | - Ying-Chun Lo
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St SW, Rochester, MN, 55905, USA
| | - Shefali Chopra
- Department of Pathology, University of Southern California, 1975 Zonal Ave, Los Angeles, CA, 90033, USA.
| | - Elizabeth G Demicco
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital and Laboratory Medicine and Pathobiology, University of Toronto, 600 University Ave, Toronto, ON, M5G 1X5, Canada.
| | - Kevin He
- Department of Internal Medicine, Division of Oncology, Washington University School of Medicine and Siteman Cancer Center, 660 S. Euclid Ave, St. Louis, MO, 63110, USA.
| | - Angela C Hirbe
- Department of Internal Medicine, Division of Oncology, Washington University School of Medicine and Siteman Cancer Center, 660 S. Euclid Ave, St. Louis, MO, 63110, USA.
| | - Andrew L Folpe
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St SW, Rochester, MN, 55905, USA.
| | - John S A Chrisinger
- Department of Pathology and Immunology, Division of Anatomic and Molecular Pathology, Washington University School of Medicine, 660 S. Euclid Ave, St. Louis, MO, 63110, USA.
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