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  • Subcutaneous chondromyxoid fibroma with a novel PNISR::GRM1 fusion - report of a primary soft tissue tumour without connection to an underlying bone
    Zupan, Andrej, 1981- ...
    Chondromyxoid fibroma (CMF) is a rare benign bone tumour. While CMF located entirely on the surface of a bone (i.e. juxtacortical CMF) has been well characterised, CMF has not so far been ... convincingly documented to arise in soft tissues without connection to an underlying bone. We report a subcutaneous CMF in a 34-year-old male, located on the distal medial aspect of the right thigh without any connection with the femur. The tumour measured 15 mm, it was well-circumscribed and displayed typical morphological features of a CMF. At the periphery, there was a small area of metaplastic bone. Immunohistochemically, the tumour cells were diffusely positive for smooth muscle actin and GRM1, and negative for S100 protein, desmin and cytokeratin AE1AE3. Whole transcriptome sequencing revealed a novel PNISR::GRM1 gene fusion. Our case indicates that CMF should be included in the differential diagnosis of soft tissue (including subcutaneous) tumours composed of spindle/ovoid cells, with a lobular architecture and chondromyxoid matrix. The diagnosis of CMF arising in soft tissues can be confirmed by identifying a GRM1 gene fusion or GRM1 expression by immunohistochemistry.
    Vir: Virchows Archiv. - ISSN 0945-6317 (Vol. 482, no. 5, 2023, str. 917-921)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 142570499

    Povezava(-e):

    https://link.springer.com/article/10.1007/s00428-023-03519-4
    Repozitorij Univerze v Ljubljani – RUL
    DOI

vir: Virchows Archiv. - ISSN 0945-6317 (Vol. 482, no. 5, 2023, str. 917-921)
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