Subcutaneous chondromyxoid fibroma with a novel PNISR::GRM1 fusion—report of a primary soft tissue tumour without connection to an underlying bone

Zupan, Andrej (avtor), Salapura, Vladka (avtor), Šekoranja, Daja (avtor), Pižem, Jože (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: chondromyxoid fibroma, extraosseous tumour, GRM1, MEF2A::ARHGAP36, PNISR::GRM1, subcutaneous tumour
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: MF - Medicinska fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: Str. 917-921
• Številčenje: Vol. 482, iss. 5
• PID: 20.500.12556/RUL-148046
• UDK: 616
• ISSN pri članku: 0945-6317
• DOI: 10.1007/s00428-023-03519-4
• COBISS.SI-ID: 142570499
• Datum objave v RUL: 26.07.2023

Gradivo je del revije

• Naslov: Virchows Archiv
• Skrajšan naslov: Virchows arch.
• Založnik: Springer Nature, European Society of Pathology
• ISSN: 0945-6317
• COBISS.SI-ID: 7571161

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: hondromiksoidni fibrom, zunajkostni tumor, GRM1

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P3-0054
• Naslov: Patologija in molekularna genetika